Enables sandbox for all windows except main

2023-04-20 17:23:19 -04:00 · 2023-04-20 17:23:19 -04:00 · e211837bcd
commit e211837bcd
parent abb839c24b
67 changed files with 1190 additions and 615 deletions
--- a/.eslintignore
+++ b/.eslintignore
@ -26,8 +26,7 @@ ts/**/*.js
 .eslintrc.js
 webpack.config.ts
 preload.bundle.*
-about.browser.bundle.*
-about.preload.bundle.*
+bundles/**

 # Sticker Creator has its own eslint config
 sticker-creator/**
--- a/.gitignore
+++ b/.gitignore
@ -27,8 +27,7 @@ libtextsecure/components.js
 stylesheets/*.css
 /storybook-static/
 preload.bundle.*
-about.browser.bundle.*
-about.preload.bundle.*
+bundles/
 ts/sql/mainWorker.bundle.js.LICENSE.txt

 # React / TypeScript
--- a/.prettierignore
+++ b/.prettierignore
@ -41,8 +41,7 @@ js/WebAudioRecorderMp3.js
 stylesheets/_intlTelInput.scss

 preload.bundle.*
-about.browser.bundle.*
-about.preload.bundle.*
+bundles/**

 # Sticker Creator has its own prettier config
 sticker-creator/**
--- a/ACKNOWLEDGMENTS.md
+++ b/ACKNOWLEDGMENTS.md
@ -391,6 +391,30 @@ Signal Desktop makes use of the following open source projects.

    License: MIT

+## buffer
+
+    The MIT License (MIT)
+
+    Copyright (c) Feross Aboukhadijeh, and other contributors.
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+
 ## cirbuf

    MIT License
@ -2398,6 +2422,10 @@ Signal Desktop makes use of the following open source projects.

    License: MIT

+## uuid-browser
+
+    License: MIT
+
 ## websocket

    Apache License
--- a/about.html
+++ b/about.html
@ -29,10 +29,6 @@
  </head>
  <body>
    <div id="app"></div>
-    <script type="application/javascript" src="ts/windows/init.js"></script>
-    <script
-      type="application/javascript"
-      src="about.browser.bundle.js"
-    ></script>
+    <script type="module" src="bundles/about/app.js"></script>
  </body>
 </html>
--- a/app/SystemTraySettingCache.ts
+++ b/app/SystemTraySettingCache.ts
@ -2,6 +2,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only

 import * as log from '../ts/logging/log';
+import OS from '../ts/util/os/osMain';
 import {
  parseSystemTraySetting,
  SystemTraySetting,
@ -54,7 +55,7 @@ export class SystemTraySettingCache {
      log.info(
        `getSystemTraySetting saw --use-tray-icon flag. Returning ${result}`
      );
-    } else if (isSystemTraySupported(this.appVersion)) {
+    } else if (isSystemTraySupported(OS, this.appVersion)) {
      const fastValue = this.ephemeralConfig.get('system-tray-setting');
      if (fastValue !== undefined) {
        log.info('getSystemTraySetting got fast value', fastValue);
--- a/app/crashReports.ts
+++ b/app/crashReports.ts
@ -10,7 +10,7 @@ import * as Errors from '../ts/types/errors';
 import { isProduction } from '../ts/util/version';
 import { upload as uploadDebugLog } from '../ts/logging/uploadDebugLog';
 import { SignalService as Proto } from '../ts/protobuf';
-import * as OS from '../ts/OS';
+import OS from '../ts/util/os/osMain';

 async function getPendingDumps(): Promise<ReadonlyArray<string>> {
  const crashDumpsPath = await realpath(app.getPath('crashDumps'));
--- a/app/main.ts
+++ b/app/main.ts
@ -48,6 +48,8 @@ import type { ThemeSettingType } from '../ts/types/StorageUIKeys';
 import { ThemeType } from '../ts/types/Util';
 import * as Errors from '../ts/types/errors';
 import { resolveCanonicalLocales } from '../ts/util/resolveCanonicalLocales';
+import * as debugLog from '../ts/logging/debuglogs';
+import * as uploadDebugLog from '../ts/logging/uploadDebugLog';
 import { explodePromise } from '../ts/util/explodePromise';

 import './startup_config';
@ -94,7 +96,7 @@ import type { CreateTemplateOptionsType } from './menu';
 import type { MenuActionType } from '../ts/types/menu';
 import { createTemplate } from './menu';
 import { installFileHandler, installWebHandler } from './protocol_filter';
-import * as OS from '../ts/OS';
+import OS from '../ts/util/os/osMain';
 import { isProduction } from '../ts/util/version';
 import {
  isSgnlHref,
@ -390,7 +392,11 @@ function getResolvedMessagesLocale(): LocaleType {
  return resolvedTranslationsLocale;
 }

-type PrepareUrlOptions = { forCalling?: boolean; forCamera?: boolean };
+type PrepareUrlOptions = {
+  forCalling?: boolean;
+  forCamera?: boolean;
+  sourceName?: string;
+};

 async function prepareFileUrl(
  pathSegments: ReadonlyArray<string>,
@ -403,9 +409,9 @@ async function prepareFileUrl(

 async function prepareUrl(
  url: URL,
-  { forCalling, forCamera }: PrepareUrlOptions = {}
+  { forCalling, forCamera, sourceName }: PrepareUrlOptions = {}
 ): Promise<string> {
-  return setUrlSearchParams(url, { forCalling, forCamera }).href;
+  return setUrlSearchParams(url, { forCalling, forCamera, sourceName }).href;
 }

 async function handleUrl(rawTarget: string) {
@ -1155,9 +1161,9 @@ async function showScreenShareWindow(sourceName: string) {
      ...defaultWebPrefs,
      nodeIntegration: false,
      nodeIntegrationInWorker: false,
-      sandbox: false,
+      sandbox: true,
      contextIsolation: true,
-      preload: join(__dirname, '../ts/windows/screenShare/preload.js'),
+      preload: join(__dirname, '../bundles/screenShare/preload.js'),
    },
    x: Math.floor(display.size.width / 2) - width / 2,
    y: 24,
@ -1173,17 +1179,13 @@ async function showScreenShareWindow(sourceName: string) {

  screenShareWindow.once('ready-to-show', () => {
    if (screenShareWindow) {
-      screenShareWindow.showInactive();
-      screenShareWindow.webContents.send(
-        'render-screen-sharing-controller',
-        sourceName
-      );
+      screenShareWindow.show();
    }
  });

  await safeLoadURL(
    screenShareWindow,
-    await prepareFileUrl([__dirname, '../screenShare.html'])
+    await prepareFileUrl([__dirname, '../screenShare.html'], { sourceName })
  );
 }

@ -1210,9 +1212,9 @@ async function showAbout() {
      ...defaultWebPrefs,
      nodeIntegration: false,
      nodeIntegrationInWorker: false,
-      sandbox: false,
+      sandbox: true,
      contextIsolation: true,
-      preload: join(__dirname, '../about.preload.bundle.js'),
+      preload: join(__dirname, '../bundles/about/preload.js'),
      nativeWindowOpen: true,
    },
  };
@ -1261,9 +1263,9 @@ async function showSettingsWindow() {
      ...defaultWebPrefs,
      nodeIntegration: false,
      nodeIntegrationInWorker: false,
-      sandbox: false,
+      sandbox: true,
      contextIsolation: true,
-      preload: join(__dirname, '../ts/windows/settings/preload.js'),
+      preload: join(__dirname, '../bundles/settings/preload.js'),
      nativeWindowOpen: true,
    },
  };
@ -1341,9 +1343,9 @@ async function showDebugLogWindow() {
      ...defaultWebPrefs,
      nodeIntegration: false,
      nodeIntegrationInWorker: false,
-      sandbox: false,
+      sandbox: true,
      contextIsolation: true,
-      preload: join(__dirname, '../ts/windows/debuglog/preload.js'),
+      preload: join(__dirname, '../bundles/debuglog/preload.js'),
      nativeWindowOpen: true,
    },
    parent: mainWindow,
@ -1406,9 +1408,9 @@ function showPermissionsPopupWindow(forCalling: boolean, forCamera: boolean) {
        ...defaultWebPrefs,
        nodeIntegration: false,
        nodeIntegrationInWorker: false,
-        sandbox: false,
+        sandbox: true,
        contextIsolation: true,
-        preload: join(__dirname, '../ts/windows/permissions/preload.js'),
+        preload: join(__dirname, '../bundles/permissions/preload.js'),
        nativeWindowOpen: true,
      },
      parent: mainWindow,
@ -1676,7 +1678,7 @@ app.on('ready', async () => {
  // would still show the window.
  // (User can change these settings later)
  if (
-    isSystemTraySupported(app.getVersion()) &&
+    isSystemTraySupported(OS, app.getVersion()) &&
    (await systemTraySettingCache.get()) === SystemTraySetting.Uninitialized
  ) {
    const newValue = SystemTraySetting.MinimizeToSystemTray;
@ -1799,9 +1801,9 @@ app.on('ready', async () => {
        webPreferences: {
          ...defaultWebPrefs,
          nodeIntegration: false,
-          sandbox: false,
+          sandbox: true,
          contextIsolation: true,
-          preload: join(__dirname, '../ts/windows/loading/preload.js'),
+          preload: join(__dirname, '../bundles/loading/preload.js'),
        },
        icon: windowIcon,
      });
@ -2278,6 +2280,8 @@ ipc.on('get-config', async event => {
    enableCI,
    nodeVersion: process.versions.node,
    hostname: os.hostname(),
+    osRelease: os.release(),
+    osVersion: os.version(),
    appInstance: process.env.NODE_APP_INSTANCE || undefined,
    proxyUrl: process.env.HTTPS_PROXY || process.env.https_proxy || undefined,
    contentProxyUrl: config.get<string>('contentProxyUrl'),
@ -2320,11 +2324,39 @@ ipc.on('locale-data', event => {
  event.returnValue = getResolvedMessagesLocale().messages;
 });

-ipc.on('getHasCustomTitleBar', event => {
+// TODO DESKTOP-5241
+ipc.on('OS.getHasCustomTitleBar', event => {
  // eslint-disable-next-line no-param-reassign
  event.returnValue = OS.hasCustomTitleBar();
 });

+// TODO DESKTOP-5241
+ipc.on('OS.getClassName', event => {
+  // eslint-disable-next-line no-param-reassign
+  event.returnValue = OS.getClassName();
+});
+
+ipc.handle(
+  'DebugLogs.getLogs',
+  async (_event, data: unknown, userAgent: string) => {
+    return debugLog.getLog(
+      data,
+      process.versions.node,
+      app.getVersion(),
+      os.version(),
+      userAgent
+    );
+  }
+);
+
+ipc.handle('DebugLogs.upload', async (_event, content: string) => {
+  return uploadDebugLog.upload({
+    content,
+    appVersion: app.getVersion(),
+    logger: getLogger(),
+  });
+});
+
 ipc.on('user-config-key', event => {
  // eslint-disable-next-line no-param-reassign
  event.returnValue = userConfig.get('key');
--- a/debug_log.html
+++ b/debug_log.html
@ -29,10 +29,6 @@
  </head>
  <body>
    <div id="app"></div>
-    <script
-      type="application/javascript"
-      src="ts/windows/applyTheme.js"
-    ></script>
-    <script type="application/javascript" src="ts/windows/init.js"></script>
+    <script type="module" src="bundles/debuglog/app.js"></script>
  </body>
 </html>
--- a/loading.html
+++ b/loading.html
@ -33,6 +33,6 @@
      </div>
      <div id="message"></div>
    </div>
-    <script type="text/javascript" src="ts/windows/loading/start.js"></script>
+    <script type="module" src="bundles/loading/start.js"></script>
  </body>
 </html>
--- a/package.json
+++ b/package.json
@ -11,6 +11,9 @@
    "email": "support@signal.org"
  },
  "browserslist": "last 1 chrome versions",
+  "browser": {
+    "uuid": "uuid-browser"
+  },
  "main": "app/main.js",
  "scripts": {
    "postinstall": "yarn build:acknowledgments && patch-package && yarn electron:install-app-deps",
@ -56,7 +59,7 @@
    "svgo": "svgo --multipass images/**/*.svg",
    "transpile": "run-p check:types build:esbuild",
    "check:types": "tsc --noEmit",
-    "clean-transpile-once": "rimraf sticker-creator/dist app/**/*.js app/*.js ts/**/*.js ts/*.js tsconfig.tsbuildinfo",
+    "clean-transpile-once": "rimraf sticker-creator/dist app/**/*.js app/*.js ts/**/*.js ts/*.js bundles tsconfig.tsbuildinfo",
    "clean-transpile": "yarn run clean-transpile-once && yarn run clean-transpile-once",
    "open-coverage": "open coverage/lcov-report/index.html",
    "ready": "npm-run-all --print-label clean-transpile generate --parallel lint lint-deps lint-intl test-node test-electron",
@ -94,6 +97,7 @@
    "blob-util": "2.0.2",
    "blueimp-load-image": "5.14.0",
    "blurhash": "1.1.3",
+    "buffer": "6.0.3",
    "cirbuf": "1.0.1",
    "classnames": "2.2.5",
    "config": "1.28.1",
@ -169,6 +173,7 @@
    "split2": "4.0.0",
    "type-fest": "3.5.0",
    "uuid": "3.3.2",
+    "uuid-browser": "3.1.0",
    "websocket": "1.0.34",
    "zod": "3.5.1"
  },
@ -424,6 +429,7 @@
      "config/default.json",
      "config/${env.SIGNAL_ENV}.json",
      "config/local-${env.SIGNAL_ENV}.json",
+      "bundles/**",
      "background.html",
      "about.html",
      "screenShare.html",
@ -456,8 +462,6 @@
      "app/*",
      "preload.bundle.js",
      "preload_utils.js",
-      "about.preload.bundle.js",
-      "about.browser.bundle.js",
      "main.js",
      "images/**",
      "fonts/**",
--- a/patches/@types+backbone+1.4.5.patch
+++ b/patches/@types+backbone+1.4.5.patch
@ -1,19 +1,28 @@
 diff --git a/node_modules/@types/backbone/index.d.ts b/node_modules/@types/backbone/index.d.ts
-index a172230..6f6de9f 100644
+index a172230..2c62e92 100644
 --- a/node_modules/@types/backbone/index.d.ts
 +++ b/node_modules/@types/backbone/index.d.ts
+@@ -81,7 +81,7 @@ declare namespace Backbone {
+         collection?: Backbone.Collection<TModel>;
+     }
+
+-    type CombinedModelConstructorOptions<E, M extends Model<any, any, E> = Model> = ModelConstructorOptions<M> & E;
+    type CombinedModelConstructorOptions<E, M extends Model<any, any, E> = Model<any, any, E>> = ModelConstructorOptions<M> & E;
+
+     interface ModelSetOptions extends Silenceable, Validable {
+     }
@@ -218,14 +218,14 @@ declare namespace Backbone {
      * E - Extensions to the model constructor options. You can accept additional constructor options
      * by listing them in the E parameter.
      */
 -    class Model<T = any, S = Backbone.ModelSetOptions, E = {}> extends ModelBase implements Events {
 +    class Model<T extends Record<string, any> = any, S = Backbone.ModelSetOptions, E = {}> extends ModelBase implements Events {
- 
+
         /**
         * Do not use, prefer TypeScript's extend functionality.
         **/
         public static extend(properties: any, classProperties?: any): any;
- 
+
 -        attributes: any;
 +        attributes: T;
         changed: any[];
--- a/permissions_popup.html
+++ b/permissions_popup.html
@ -24,10 +24,6 @@
  </head>
  <body>
    <div id="app"></div>
-    <script
-      type="application/javascript"
-      src="ts/windows/applyTheme.js"
-    ></script>
-    <script type="application/javascript" src="ts/windows/init.js"></script>
+    <script type="module" src="bundles/permissions/app.js"></script>
  </body>
 </html>
--- a/screenShare.html
+++ b/screenShare.html
@ -24,5 +24,6 @@
  </head>
  <body>
    <div id="app"></div>
+    <script type="module" src="bundles/screenShare/app.js"></script>
  </body>
 </html>
--- a/scripts/esbuild.js
+++ b/scripts/esbuild.js
@ -6,6 +6,7 @@ const path = require('path');
 const glob = require('glob');

 const ROOT_DIR = path.join(__dirname, '..');
+const BUNDLES_DIR = 'bundles';

 const watch = process.argv.some(argv => argv === '-w' || argv === '--watch');
 const isProd = process.argv.some(argv => argv === '-prod' || argv === '--prod');
@ -26,6 +27,7 @@ const bundleDefaults = {
    'process.env.NODE_ENV': isProd ? '"production"' : '"development"',
  },
  bundle: true,
+  minify: isProd,
  external: [
    // Native libraries
    '@signalapp/libsignal-client',
@ -61,55 +63,94 @@ const bundleDefaults = {
  ],
 };

-async function main() {
-  // App, tests, and scripts
-  const app = await esbuild.context({
-    ...nodeDefaults,
-    format: 'cjs',
-    mainFields: ['browser', 'main'],
-    entryPoints: glob
-      .sync('{app,ts}/**/*.{ts,tsx}', {
-        nodir: true,
-        root: ROOT_DIR,
-      })
-      .filter(file => !file.endsWith('.d.ts')),
-    outdir: path.join(ROOT_DIR),
-  });
+const sandboxedPreloadDefaults = {
+  ...nodeDefaults,
+  define: {
+    'process.env.NODE_ENV': isProd ? '"production"' : '"development"',
+  },
+  external: ['electron'],
+  bundle: true,
+  minify: isProd,
+};

-  // Preload bundle
-  const bundle = await esbuild.context({
-    ...bundleDefaults,
-    mainFields: ['browser', 'main'],
-    entryPoints: [path.join(ROOT_DIR, 'ts', 'windows', 'main', 'preload.ts')],
-    outfile: path.join(ROOT_DIR, 'preload.bundle.js'),
-  });
+const sandboxedBrowserDefaults = {
+  ...sandboxedPreloadDefaults,
+  chunkNames: 'chunks/[name]-[hash]',
+  format: 'esm',
+  outdir: path.join(ROOT_DIR, BUNDLES_DIR),
+  platform: 'browser',
+  splitting: true,
+};
+
+async function build({ appConfig, preloadConfig }) {
+  const app = await esbuild.context(appConfig);
+  const preload = await esbuild.context(preloadConfig);

  if (watch) {
-    await Promise.all([app.watch(), bundle.watch()]);
+    await Promise.all([app.watch(), preload.watch()]);
  } else {
-    await Promise.all([app.rebuild(), bundle.rebuild()]);
+    await Promise.all([app.rebuild(), preload.rebuild()]);

    await app.dispose();
-    await bundle.dispose();
+    await preload.dispose();
  }
 }

-main().catch(error => {
+async function main() {
+  await build({
+    appConfig: {
+      ...nodeDefaults,
+      format: 'cjs',
+      mainFields: ['browser', 'main'],
+      entryPoints: glob
+        .sync('{app,ts}/**/*.{ts,tsx}', {
+          nodir: true,
+          root: ROOT_DIR,
+        })
+        .filter(file => !file.endsWith('.d.ts')),
+      outdir: path.join(ROOT_DIR),
+    },
+    preloadConfig: {
+      ...bundleDefaults,
+      mainFields: ['browser', 'main'],
+      entryPoints: [path.join(ROOT_DIR, 'ts', 'windows', 'main', 'preload.ts')],
+      outfile: path.join(ROOT_DIR, 'preload.bundle.js'),
+    },
+  });
+}
+
+async function sandboxedEnv() {
+  await build({
+    appConfig: {
+      ...sandboxedBrowserDefaults,
+      mainFields: ['browser', 'main'],
+      entryPoints: [
+        path.join(ROOT_DIR, 'ts', 'windows', 'about', 'app.tsx'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'debuglog', 'app.tsx'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'loading', 'start.ts'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'permissions', 'app.tsx'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'screenShare', 'app.tsx'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'settings', 'app.tsx'),
+      ],
+    },
+    preloadConfig: {
+      ...sandboxedPreloadDefaults,
+      mainFields: ['main'],
+      entryPoints: [
+        path.join(ROOT_DIR, 'ts', 'windows', 'about', 'preload.ts'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'debuglog', 'preload.ts'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'loading', 'preload.ts'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'permissions', 'preload.ts'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'screenShare', 'preload.ts'),
+        path.join(ROOT_DIR, 'ts', 'windows', 'settings', 'preload.ts'),
+      ],
+      format: 'cjs',
+      outdir: 'bundles',
+    },
+  });
+}
+
+Promise.all([main(), sandboxedEnv()]).catch(error => {
  console.error(error.stack);
  process.exit(1);
 });
-
-// About bundle
-esbuild.build({
-  ...bundleDefaults,
-  mainFields: ['browser', 'main'],
-  entryPoints: [path.join(ROOT_DIR, 'ts', 'windows', 'about', 'app.tsx')],
-  outfile: path.join(ROOT_DIR, 'about.browser.bundle.js'),
-});
-
-esbuild.build({
-  ...bundleDefaults,
-  mainFields: ['browser', 'main'],
-  entryPoints: [path.join(ROOT_DIR, 'ts', 'windows', 'about', 'preload.ts')],
-  outfile: path.join(ROOT_DIR, 'about.preload.bundle.js'),
-});
--- a/settings.html
+++ b/settings.html
@ -29,10 +29,6 @@
  </head>
  <body>
    <div id="app"></div>
-    <script
-      type="application/javascript"
-      src="ts/windows/applyTheme.js"
-    ></script>
-    <script type="application/javascript" src="ts/windows/init.js"></script>
+    <script type="module" src="bundles/settings/app.js"></script>
  </body>
 </html>
--- a/ts/OS.ts
+++ b/ts/OS.ts
@ -1,48 +0,0 @@
-// Copyright 2018 Signal Messenger, LLC
-// SPDX-License-Identifier: AGPL-3.0-only
-
-import { release as osRelease } from 'os';
-import semver from 'semver';
-
-const createIsPlatform = (
-  platform: typeof process.platform
-): ((minVersion?: string) => boolean) => {
-  return minVersion => {
-    if (process.platform !== platform) {
-      return false;
-    }
-    if (minVersion === undefined) {
-      return true;
-    }
-
-    return semver.gte(osRelease(), minVersion);
-  };
-};
-
-export const isMacOS = createIsPlatform('darwin');
-export const isLinux = createIsPlatform('linux');
-export const isWindows = createIsPlatform('win32');
-
-// Windows 10 and above
-export const hasCustomTitleBar = (): boolean =>
-  isWindows('10.0.0') || Boolean(process.env.CUSTOM_TITLEBAR);
-
-export const getName = (): string => {
-  if (isMacOS()) {
-    return 'macOS';
-  }
-  if (isWindows()) {
-    return 'Windows';
-  }
-  return 'Linux';
-};
-
-export const getClassName = (): string => {
-  if (isMacOS()) {
-    return 'os-macos';
-  }
-  if (isWindows()) {
-    return 'os-windows';
-  }
-  return 'os-linux';
-};
--- a/ts/calling/audioDeviceModule.ts
+++ b/ts/calling/audioDeviceModule.ts
@ -2,7 +2,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only

 import { makeEnumParser } from '../util/enum';
-import * as OS from '../OS';
+import OS from '../util/os/osMain';

 export enum AudioDeviceModule {
  Default = 'Default',
--- a/ts/components/DebugLogWindow.tsx
+++ b/ts/components/DebugLogWindow.tsx
@ -4,18 +4,18 @@
 import type { MouseEvent } from 'react';
 import React, { useEffect, useState } from 'react';
 import copyText from 'copy-text-to-clipboard';
+import type { ExecuteMenuRoleType } from './TitleBarContainer';
+import type { LocalizerType } from '../types/Util';
+import * as Errors from '../types/errors';
 import * as log from '../logging/log';
 import { Button, ButtonVariant } from './Button';
-import type { LocalizerType } from '../types/Util';
 import { Spinner } from './Spinner';
+import { TitleBarContainer } from './TitleBarContainer';
 import { ToastDebugLogError } from './ToastDebugLogError';
 import { ToastLinkCopied } from './ToastLinkCopied';
-import { TitleBarContainer } from './TitleBarContainer';
-import type { ExecuteMenuRoleType } from './TitleBarContainer';
 import { ToastLoadingFullLogs } from './ToastLoadingFullLogs';
-import { openLinkInWebBrowser } from '../util/openLinkInWebBrowser';
 import { createSupportUrl } from '../util/createSupportUrl';
-import * as Errors from '../types/errors';
+import { openLinkInWebBrowser } from '../util/openLinkInWebBrowser';
 import { useEscapeHandling } from '../hooks/useEscapeHandling';
 import { useTheme } from '../hooks/useTheme';

@ -137,7 +137,7 @@ export function DebugLogWindow({
    };

    const supportURL = createSupportUrl({
-      locale: i18n.getLocale(),
+      locale: window.SignalContext.getI18nLocale(),
      query: {
        debugLog: publicLogURL,
      },
--- a/ts/components/Preferences.tsx
+++ b/ts/components/Preferences.tsx
@ -1,11 +1,11 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

+import type { AudioDevice } from '@signalapp/ringrtc';
 import type { ReactNode } from 'react';
 import React, { useEffect, useState, useCallback, useMemo } from 'react';
 import { noop } from 'lodash';
 import classNames from 'classnames';
-import type { AudioDevice } from '@signalapp/ringrtc';
 import uuid from 'uuid';

 import type { MediaDeviceSettings } from '../types/Calling';
@ -15,6 +15,19 @@ import type {
  ZoomFactorType,
 } from '../types/Storage.d';
 import type { ThemeSettingType } from '../types/StorageUIKeys';
+import type { ConversationType } from '../state/ducks/conversations';
+import type {
+  ConversationColorType,
+  CustomColorType,
+  DefaultConversationColorType,
+} from '../types/Colors';
+import type {
+  LocalizerType,
+  SentMediaQualityType,
+  ThemeType,
+} from '../types/Util';
+import type { ExecuteMenuRoleType } from './TitleBarContainer';
+
 import { Button, ButtonVariant } from './Button';
 import { ChatColorPicker } from './ChatColorPicker';
 import { Checkbox } from './Checkbox';
@ -23,24 +36,12 @@ import {
  Variant as CircleCheckboxVariant,
 } from './CircleCheckbox';
 import { ConfirmationDialog } from './ConfirmationDialog';
-import type { ConversationType } from '../state/ducks/conversations';
-import type {
-  ConversationColorType,
-  CustomColorType,
-  DefaultConversationColorType,
-} from '../types/Colors';
 import { DisappearingTimeDialog } from './DisappearingTimeDialog';
-import type {
-  LocalizerType,
-  SentMediaQualityType,
-  ThemeType,
-} from '../types/Util';
 import { PhoneNumberDiscoverability } from '../util/phoneNumberDiscoverability';
 import { PhoneNumberSharingMode } from '../util/phoneNumberSharingMode';
 import { Select } from './Select';
 import { Spinner } from './Spinner';
 import { TitleBarContainer } from './TitleBarContainer';
-import type { ExecuteMenuRoleType } from './TitleBarContainer';
 import { getCustomColorStyle } from '../util/getCustomColorStyle';
 import {
  DEFAULT_DURATIONS_IN_SECONDS,
@ -179,6 +180,8 @@ type PropsFunctionType = {

 export type PropsType = PropsDataType & PropsFunctionType;

+export type PropsPreloadType = Omit<PropsType, 'i18n'>;
+
 enum Page {
  // Accessible through left nav
  General = 'General',
--- a/ts/context/i18n.ts
+++ b/ts/context/i18n.ts
@ -1,8 +1,8 @@
 // Copyright 2023 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import { ipcRenderer } from 'electron';
 import { config } from './config';
+import { localeMessages } from './localeMessages';
 import { setupI18n } from '../util/setupI18n';
 import { strictAssert } from '../util/assert';

@ -16,7 +16,6 @@ strictAssert(
  'locale is not a string'
 );

-const localeMessages = ipcRenderer.sendSync('locale-data');
 const i18n = setupI18n(resolvedTranslationsLocale, localeMessages);

 export { i18n };
--- a/ts/context/localeMessages.ts
+++ b/ts/context/localeMessages.ts
@ -0,0 +1,6 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { ipcRenderer } from 'electron';
+
+export const localeMessages = ipcRenderer.sendSync('locale-data');
--- a/ts/environment.ts
+++ b/ts/environment.ts
@ -1,8 +1,6 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import { z } from 'zod';
-
 import { makeEnumParser } from './util/enum';

 // Many places rely on this enum being a string.
@ -13,8 +11,6 @@ export enum Environment {
  Test = 'test',
 }

-export const environmentSchema = z.nativeEnum(Environment);
-
 let environment: undefined | Environment;

 export function getEnvironment(): Environment {
--- a/ts/logging/debuglogs.ts
+++ b/ts/logging/debuglogs.ts
@ -2,8 +2,6 @@
 // SPDX-License-Identifier: AGPL-3.0-only

 import { memoize, sortBy } from 'lodash';
-import os from 'os';
-import { ipcRenderer as ipc } from 'electron';
 import { reallyJsonStringify } from '../util/reallyJsonStringify';
 import type { FetchLogIpcData, LogEntryType } from './shared';
 import {
@ -42,16 +40,18 @@ const getHeader = (
    user,
  }: Omit<FetchLogIpcData, 'logEntries'>,
  nodeVersion: string,
-  appVersion: string
+  appVersion: string,
+  osVersion: string,
+  userAgent: string
 ): string =>
  [
    headerSection('System info', {
      Time: Date.now(),
-      'User agent': window.navigator.userAgent,
+      'User agent': userAgent,
      'Node version': nodeVersion,
      Environment: getEnvironment(),
      'App version': appVersion,
-      'OS version': os.version(),
+      'OS version': osVersion,
    }),
    headerSection('User info', user),
    headerSection('Capabilities', capabilities),
@ -79,17 +79,18 @@ function formatLine(mightBeEntry: unknown): string {
  return `${getLevel(entry.level)} ${entry.time} ${entry.msg}`;
 }

-export async function fetch(
+export function getLog(
+  data: unknown,
  nodeVersion: string,
-  appVersion: string
-): Promise<string> {
-  const data: unknown = await ipc.invoke('fetch-log');
-
+  appVersion: string,
+  osVersion: string,
+  userAgent: string
+): string {
  let header: string;
  let body: string;
  if (isFetchLogIpcData(data)) {
    const { logEntries } = data;
-    header = getHeader(data, nodeVersion, appVersion);
+    header = getHeader(data, nodeVersion, appVersion, osVersion, userAgent);
    body = logEntries.map(formatLine).join('\n');
  } else {
    header = headerSectionTitle('Partial logs');
--- a/ts/logging/log.ts
+++ b/ts/logging/log.ts
@ -1,7 +1,7 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import { noop } from 'lodash';
+import noop from 'lodash/noop';
 import type { LogFunction } from '../types/Logging';
 import { LogLevel } from '../types/Logging';

--- a/ts/services/ActiveWindowService.ts
+++ b/ts/services/ActiveWindowService.ts
@ -1,7 +1,7 @@
 // Copyright 2020 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import { throttle } from 'lodash';
+import { throttle } from '../util/throttle';

 // Idle timer - you're active for ACTIVE_TIMEOUT after one of these events
 const ACTIVE_TIMEOUT = 15 * 1000;
--- a/ts/services/notifications.ts
+++ b/ts/services/notifications.ts
@ -1,6 +1,7 @@
 // Copyright 2015 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

+import os from 'os';
 import { debounce } from 'lodash';
 import EventEmitter from 'events';
 import { Sound } from '../util/Sound';
@ -9,7 +10,7 @@ import {
  getAudioNotificationSupport,
  shouldHideExpiringMessageBody,
 } from '../types/Settings';
-import * as OS from '../OS';
+import OS from '../util/os/osMain';
 import * as log from '../logging/log';
 import { makeEnumParser } from '../util/enum';
 import { missingCaseError } from '../util/missingCaseError';
@ -144,7 +145,7 @@ class NotificationService extends EventEmitter {

    this.lastNotification?.close();

-    const audioNotificationSupport = getAudioNotificationSupport();
+    const audioNotificationSupport = getAudioNotificationSupport(OS);

    const notification = new window.Notification(title, {
      body: OS.isLinux() ? filterNotificationText(message) : message,
@ -299,7 +300,10 @@ class NotificationService extends EventEmitter {
        notificationTitle = senderTitle;
        ({ notificationIconUrl } = notificationData);

-        if (isExpiringMessage && shouldHideExpiringMessageBody()) {
+        if (
+          isExpiringMessage &&
+          shouldHideExpiringMessageBody(OS, os.release())
+        ) {
          notificationMessage = i18n('icu:newMessage');
        } else if (userSetting === NotificationSetting.NameOnly) {
          if (reaction) {
--- a/ts/signal.ts
+++ b/ts/signal.ts
@ -8,7 +8,7 @@ import * as Curve from './Curve';
 import { start as conversationControllerStart } from './ConversationController';
 import Data from './sql/Client';
 import * as Groups from './groups';
-import * as OS from './OS';
+import OS from './util/os/osMain';
 import * as RemoteConfig from './RemoteConfig';

 // Components
--- a/ts/state/ducks/user.ts
+++ b/ts/state/ducks/user.ts
@ -9,7 +9,7 @@ import type { LocalizerType } from '../../types/Util';
 import type { MenuOptionsType } from '../../types/menu';
 import type { NoopActionType } from './noop';
 import type { UUIDStringType } from '../../types/UUID';
-import * as OS from '../../OS';
+import OS from '../../util/os/osMain';
 import { ThemeType } from '../../types/Util';

 // State
@ -116,6 +116,7 @@ export function getEmptyState(): UserStateType {
      getLocale: intlNotSetup,
      getIntl: intlNotSetup,
      isLegacyFormat: intlNotSetup,
+      getLocaleMessages: intlNotSetup,
      getLocaleDirection: intlNotSetup,
    }),
    interactionMode: 'mouse',
--- a/ts/state/getInitialState.ts
+++ b/ts/state/getInitialState.ts
@ -32,7 +32,7 @@ import type { MainWindowStatsType } from '../windows/context';
 import type { MenuOptionsType } from '../types/menu';
 import type { StoryDataType } from './ducks/stories';
 import type { StoryDistributionListDataType } from './ducks/storyDistributionLists';
-import * as OS from '../OS';
+import OS from '../util/os/osMain';
 import { UUIDKind } from '../types/UUID';
 import { getEmojiReducerState as emojis } from '../util/loadRecentEmojis';
 import { getInitialState as stickers } from '../types/Stickers';
@ -132,7 +132,7 @@ export function getInitialState({
      interactionMode: getInteractionMode(),
      isMainWindowFullScreen: mainWindowStats.isFullScreen,
      isMainWindowMaximized: mainWindowStats.isMaximized,
-      localeMessages: window.SignalContext.localeMessages,
+      localeMessages: window.i18n.getLocaleMessages(),
      menuOptions,
      osName,
      ourACI,
--- a/ts/state/smart/App.tsx
+++ b/ts/state/smart/App.tsx
@ -7,7 +7,7 @@ import type { MenuItemConstructorOptions } from 'electron';

 import type { MenuActionType } from '../../types/menu';
 import { App } from '../../components/App';
-import { getName as getOSName, getClassName as getOSClassName } from '../../OS';
+import OS from '../../util/os/osMain';
 import { SmartCallManager } from './CallManager';
 import { SmartGlobalModalContainer } from './GlobalModalContainer';
 import { SmartLightbox } from './Lightbox';
@ -47,8 +47,8 @@ const mapStateToProps = (state: StateType) => {
    isFullScreen: getIsMainWindowFullScreen(state),
    menuOptions: getMenuOptions(state),
    hasCustomTitleBar: window.SignalContext.OS.hasCustomTitleBar(),
-    OS: getOSName(),
-    osClassName: getOSClassName(),
+    OS: OS.getName(),
+    osClassName: OS.getClassName(),
    hideMenuBar: getHideMenuBar(state),
    renderCallManager: () => (
      <ModalContainer className="module-calling__modal-container">
--- a/ts/state/smart/InstallScreen.tsx
+++ b/ts/state/smart/InstallScreen.tsx
@ -27,7 +27,7 @@ import { HTTPError } from '../../textsecure/Errors';
 import { isRecord } from '../../util/isRecord';
 import * as Errors from '../../types/errors';
 import { normalizeDeviceName } from '../../util/normalizeDeviceName';
-import { getName as getOSName } from '../../OS';
+import OS from '../../util/os/osMain';

 type PropsType = ComponentProps<typeof InstallScreen>;

@ -258,7 +258,7 @@ export function SmartInstallScreen(): ReactElement {
          updates,
          currentVersion: window.getVersion(),
          startUpdate,
-          OS: getOSName(),
+          OS: OS.getName(),
        },
      };
      break;
--- a/ts/state/smart/UnsupportedOSDialog.tsx
+++ b/ts/state/smart/UnsupportedOSDialog.tsx
@ -8,7 +8,7 @@ import { UnsupportedOSDialog } from '../../components/UnsupportedOSDialog';
 import { getIntl } from '../selectors/user';
 import { getExpirationTimestamp } from '../selectors/expiration';
 import type { WidthBreakpoint } from '../../components/_util';
-import { getName as getOSName } from '../../OS';
+import OS from '../../util/os/osMain';

 export type PropsType = Readonly<{
  type: 'warning' | 'error';
@ -18,14 +18,14 @@ export type PropsType = Readonly<{
 export function SmartUnsupportedOSDialog(ownProps: PropsType): JSX.Element {
  const i18n = useSelector(getIntl);
  const expirationTimestamp = useSelector(getExpirationTimestamp);
-  const OS = getOSName();
+  const osName = OS.getName();

  return (
    <UnsupportedOSDialog
      {...ownProps}
      i18n={i18n}
      expirationTimestamp={expirationTimestamp}
-      OS={OS}
+      OS={osName}
    />
  );
 }
--- a/ts/state/smart/UpdateDialog.tsx
+++ b/ts/state/smart/UpdateDialog.tsx
@ -8,7 +8,7 @@ import type { StateType } from '../reducer';
 import { getIntl } from '../selectors/user';
 import { getExpirationTimestamp } from '../selectors/expiration';
 import type { WidthBreakpoint } from '../../components/_util';
-import { getName as getOSName } from '../../OS';
+import OS from '../../util/os/osMain';

 type PropsType = Readonly<{ containerWidthBreakpoint: WidthBreakpoint }>;

@ -18,7 +18,7 @@ const mapStateToProps = (state: StateType, ownProps: PropsType) => {
    i18n: getIntl(state),
    currentVersion: window.getVersion(),
    expirationTimestamp: getExpirationTimestamp(state),
-    OS: getOSName(),
+    OS: OS.getName(),
    ...ownProps,
  };
 };
--- a/ts/test-node/types/Settings_test.ts
+++ b/ts/test-node/types/Settings_test.ts
@ -5,6 +5,7 @@ import os from 'os';
 import Sinon from 'sinon';
 import { assert } from 'chai';

+import { getOSFunctions } from '../../util/os/shared';
 import * as Settings from '../../types/Settings';

 describe('Settings', () => {
@ -21,8 +22,9 @@ describe('Settings', () => {
  describe('getAudioNotificationSupport', () => {
    it('returns native support on macOS', () => {
      sandbox.stub(process, 'platform').value('darwin');
+      const OS = getOSFunctions(os.release());
      assert.strictEqual(
-        Settings.getAudioNotificationSupport(),
+        Settings.getAudioNotificationSupport(OS),
        Settings.AudioNotificationSupport.Native
      );
    });
@ -30,8 +32,9 @@ describe('Settings', () => {
    it('returns no support on Windows 7', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('7.0.0');
+      const OS = getOSFunctions(os.release());
      assert.strictEqual(
-        Settings.getAudioNotificationSupport(),
+        Settings.getAudioNotificationSupport(OS),
        Settings.AudioNotificationSupport.None
      );
    });
@ -39,16 +42,18 @@ describe('Settings', () => {
    it('returns native support on Windows 8', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('8.0.0');
+      const OS = getOSFunctions(os.release());
      assert.strictEqual(
-        Settings.getAudioNotificationSupport(),
+        Settings.getAudioNotificationSupport(OS),
        Settings.AudioNotificationSupport.Native
      );
    });

    it('returns custom support on Linux', () => {
      sandbox.stub(process, 'platform').value('linux');
+      const OS = getOSFunctions(os.release());
      assert.strictEqual(
-        Settings.getAudioNotificationSupport(),
+        Settings.getAudioNotificationSupport(OS),
        Settings.AudioNotificationSupport.Custom
      );
    });
@ -57,48 +62,56 @@ describe('Settings', () => {
  describe('isAudioNotificationSupported', () => {
    it('returns true on macOS', () => {
      sandbox.stub(process, 'platform').value('darwin');
-      assert.isTrue(Settings.isAudioNotificationSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isAudioNotificationSupported(OS));
    });

    it('returns false on Windows 7', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('7.0.0');
-      assert.isFalse(Settings.isAudioNotificationSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isFalse(Settings.isAudioNotificationSupported(OS));
    });

    it('returns true on Windows 8', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('8.0.0');
-      assert.isTrue(Settings.isAudioNotificationSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isAudioNotificationSupported(OS));
    });

    it('returns true on Linux', () => {
      sandbox.stub(process, 'platform').value('linux');
-      assert.isTrue(Settings.isAudioNotificationSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isAudioNotificationSupported(OS));
    });
  });

  describe('isNotificationGroupingSupported', () => {
    it('returns true on macOS', () => {
      sandbox.stub(process, 'platform').value('darwin');
-      assert.isTrue(Settings.isNotificationGroupingSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isNotificationGroupingSupported(OS));
    });

    it('returns true on Windows 7', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('7.0.0');
-      assert.isFalse(Settings.isNotificationGroupingSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isFalse(Settings.isNotificationGroupingSupported(OS));
    });

    it('returns true on Windows 8', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('8.0.0');
-      assert.isTrue(Settings.isNotificationGroupingSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isNotificationGroupingSupported(OS));
    });

    it('returns true on Linux', () => {
      sandbox.stub(process, 'platform').value('linux');
-      assert.isTrue(Settings.isNotificationGroupingSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isNotificationGroupingSupported(OS));
    });
  });

@ -106,88 +119,103 @@ describe('Settings', () => {
    it('returns true on Windows', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('8.0.0');
-      assert.isTrue(Settings.isAutoLaunchSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isAutoLaunchSupported(OS));
    });

    it('returns true on macOS', () => {
      sandbox.stub(process, 'platform').value('darwin');
-      assert.isTrue(Settings.isAutoLaunchSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isAutoLaunchSupported(OS));
    });

    it('returns false on Linux', () => {
      sandbox.stub(process, 'platform').value('linux');
-      assert.isFalse(Settings.isAutoLaunchSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isFalse(Settings.isAutoLaunchSupported(OS));
    });
  });

  describe('isHideMenuBarSupported', () => {
    it('returns false on macOS', () => {
      sandbox.stub(process, 'platform').value('darwin');
-      assert.isFalse(Settings.isHideMenuBarSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isFalse(Settings.isHideMenuBarSupported(OS));
    });

    it('returns true on Windows 7', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('7.0.0');
-      assert.isTrue(Settings.isHideMenuBarSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isHideMenuBarSupported(OS));
    });

    it('returns true on Windows 8', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('8.0.0');
-      assert.isTrue(Settings.isHideMenuBarSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isHideMenuBarSupported(OS));
    });

    it('returns true on Linux', () => {
      sandbox.stub(process, 'platform').value('linux');
-      assert.isTrue(Settings.isHideMenuBarSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isHideMenuBarSupported(OS));
    });
  });

  describe('isDrawAttentionSupported', () => {
    it('returns false on macOS', () => {
      sandbox.stub(process, 'platform').value('darwin');
-      assert.isFalse(Settings.isDrawAttentionSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isFalse(Settings.isDrawAttentionSupported(OS));
    });

    it('returns true on Windows 7', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('7.0.0');
-      assert.isTrue(Settings.isDrawAttentionSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isDrawAttentionSupported(OS));
    });

    it('returns true on Windows 8', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('8.0.0');
-      assert.isTrue(Settings.isDrawAttentionSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isDrawAttentionSupported(OS));
    });

    it('returns true on Linux', () => {
      sandbox.stub(process, 'platform').value('linux');
-      assert.isTrue(Settings.isDrawAttentionSupported());
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isDrawAttentionSupported(OS));
    });
  });

  describe('isSystemTraySupported', () => {
    it('returns false on macOS', () => {
      sandbox.stub(process, 'platform').value('darwin');
-      assert.isFalse(Settings.isSystemTraySupported('1.2.3'));
+      const OS = getOSFunctions(os.release());
+      assert.isFalse(Settings.isSystemTraySupported(OS, '1.2.3'));
    });

    it('returns true on Windows 8', () => {
      sandbox.stub(process, 'platform').value('win32');
      sandbox.stub(os, 'release').returns('8.0.0');
-      assert.isTrue(Settings.isSystemTraySupported('1.2.3'));
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isSystemTraySupported(OS, '1.2.3'));
    });

    it('returns false on Linux production', () => {
      sandbox.stub(process, 'platform').value('linux');
-      assert.isFalse(Settings.isSystemTraySupported('1.2.3'));
+      const OS = getOSFunctions(os.release());
+      assert.isFalse(Settings.isSystemTraySupported(OS, '1.2.3'));
    });

    it('returns true on Linux beta', () => {
      sandbox.stub(process, 'platform').value('linux');
-      assert.isTrue(Settings.isSystemTraySupported('1.2.3-beta.4'));
+      const OS = getOSFunctions(os.release());
+      assert.isTrue(Settings.isSystemTraySupported(OS, '1.2.3-beta.4'));
    });
  });
 });
--- a/ts/textsecure/SendMessage.ts
+++ b/ts/textsecure/SendMessage.ts
@ -715,7 +715,7 @@ export default class MessageSender {
        storyMessage.fileAttachment = fileAttachment;
      } catch (error) {
        if (error instanceof HTTPError) {
-          throw new MessageError(message, error);
+          throw new MessageError(storyMessage, error);
        } else {
          throw error;
        }
--- a/ts/types/RendererConfig.ts
+++ b/ts/types/RendererConfig.ts
@ -3,8 +3,10 @@

 import { z } from 'zod';

+import { Environment } from '../environment';
 import { themeSettingSchema } from './StorageUIKeys';
-import { environmentSchema } from '../environment';
+
+const environmentSchema = z.nativeEnum(Environment);

 const configRequiredStringSchema = z.string().nonempty();
 export type ConfigRequiredStringType = z.infer<
@ -39,6 +41,8 @@ export const rendererConfigSchema = z.object({
  environment: environmentSchema,
  homePath: configRequiredStringSchema,
  hostname: configRequiredStringSchema,
+  osRelease: configRequiredStringSchema,
+  osVersion: configRequiredStringSchema,
  resolvedTranslationsLocale: configRequiredStringSchema,
  resolvedTranslationsLocaleDirection: z.enum(['ltr', 'rtl']),
  preferredSystemLocales: z.array(configRequiredStringSchema),
--- a/ts/types/Settings.ts
+++ b/ts/types/Settings.ts
@ -2,9 +2,8 @@
 // SPDX-License-Identifier: AGPL-3.0-only

 import semver from 'semver';
-import os from 'os';

-import * as OS from '../OS';
+import type { OSType } from '../util/os/shared';
 import { isProduction } from '../util/version';

 const MIN_WINDOWS_VERSION = '8.0.0';
@ -15,7 +14,9 @@ export enum AudioNotificationSupport {
  Custom,
 }

-export function getAudioNotificationSupport(): AudioNotificationSupport {
+export function getAudioNotificationSupport(
+  OS: OSType
+): AudioNotificationSupport {
  if (OS.isWindows(MIN_WINDOWS_VERSION) || OS.isMacOS()) {
    return AudioNotificationSupport.Native;
  }
@ -25,42 +26,48 @@ export function getAudioNotificationSupport(): AudioNotificationSupport {
  return AudioNotificationSupport.None;
 }

-export const isAudioNotificationSupported = (): boolean =>
-  getAudioNotificationSupport() !== AudioNotificationSupport.None;
+export const isAudioNotificationSupported = (OS: OSType): boolean =>
+  getAudioNotificationSupport(OS) !== AudioNotificationSupport.None;

 // Using `Notification::tag` has a bug on Windows 7:
 // https://github.com/electron/electron/issues/11189
-export const isNotificationGroupingSupported = (): boolean =>
+export const isNotificationGroupingSupported = (OS: OSType): boolean =>
  !OS.isWindows() || OS.isWindows(MIN_WINDOWS_VERSION);

 // Login item settings are only supported on macOS and Windows, according to [Electron's
 //   docs][0].
 // [0]: https://www.electronjs.org/docs/api/app#appsetloginitemsettingssettings-macos-windows
-export const isAutoLaunchSupported = (): boolean =>
+export const isAutoLaunchSupported = (OS: OSType): boolean =>
  OS.isWindows() || OS.isMacOS();

 // the "hide menu bar" option is specific to Windows and Linux
-export const isHideMenuBarSupported = (): boolean => !OS.isMacOS();
+export const isHideMenuBarSupported = (OS: OSType): boolean => !OS.isMacOS();

 // the "draw attention on notification" option is specific to Windows and Linux
-export const isDrawAttentionSupported = (): boolean => !OS.isMacOS();
+export const isDrawAttentionSupported = (OS: OSType): boolean => !OS.isMacOS();

 /**
 * Returns `true` if you can minimize the app to the system tray. Users can override this
 * option with a command line flag, but that is not officially supported.
 */
-export const isSystemTraySupported = (appVersion: string): boolean =>
+export const isSystemTraySupported = (
+  OS: OSType,
+  appVersion: string
+): boolean =>
  // We eventually want to support Linux in production.
  OS.isWindows() || (OS.isLinux() && !isProduction(appVersion));

 // On Windows minimize and start in system tray is default when app is selected
 // to launch at login, because we can provide `['--start-in-tray']` args.
 export const isMinimizeToAndStartInSystemTraySupported = (
+  OS: OSType,
  appVersion: string
-): boolean => !OS.isWindows() && isSystemTraySupported(appVersion);
+): boolean => !OS.isWindows() && isSystemTraySupported(OS, appVersion);

-export const isAutoDownloadUpdatesSupported = (): boolean =>
+export const isAutoDownloadUpdatesSupported = (OS: OSType): boolean =>
  OS.isWindows() || OS.isMacOS();

-export const shouldHideExpiringMessageBody = (): boolean =>
-  OS.isWindows() || (OS.isMacOS() && semver.lt(os.release(), '21.1.0'));
+export const shouldHideExpiringMessageBody = (
+  OS: OSType,
+  release: string
+): boolean => OS.isWindows() || (OS.isMacOS() && semver.lt(release, '21.1.0'));
--- a/ts/types/Util.ts
+++ b/ts/types/Util.ts
@ -5,6 +5,8 @@ import type { IntlShape } from 'react-intl';
 import type { UUIDStringType } from './UUID';
 import type { LocaleDirection } from '../../app/locale';

+import type { LocaleMessagesType } from './I18N';
+
 export type StoryContextType = {
  authorUuid?: UUIDStringType;
  timestamp: number;
@ -24,6 +26,7 @@ export type LocalizerType = {
  getIntl(): IntlShape;
  isLegacyFormat(key: string): boolean;
  getLocale(): string;
+  getLocaleMessages(): LocaleMessagesType;
  getLocaleDirection(): LocaleDirection;
 };

--- a/ts/types/errors.ts
+++ b/ts/types/errors.ts
@ -1,20 +1,18 @@
 // Copyright 2018 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import { get, has } from 'lodash';
-
 export function toLogFormat(error: unknown): string {
  let result = '';
  if (error instanceof Error && error.stack) {
    result = error.stack;
-  } else if (has(error, 'message')) {
-    result = get(error, 'message');
+  } else if (error && typeof error === 'object' && 'message' in error) {
+    result = String(error.message);
  } else {
    result = String(error);
  }

-  if (has(error, 'cause')) {
-    result += `\nCaused by: ${String(get(error, 'cause'))}`;
+  if (error && typeof error === 'object' && 'cause' in error) {
+    result += `\nCaused by: ${String(error.cause)}`;
  }

  return result;
--- a/ts/util/lint/exceptions.json
+++ b/ts/util/lint/exceptions.json
@ -2525,7 +2525,7 @@
  {
    "rule": "DOM-innerHTML",
    "path": "ts/windows/loading/start.ts",
-    "line": "  message.innerHTML = window.SignalContext.i18n('icu:optimizingApplication');",
+    "line": "  message.innerHTML = window.i18n('icu:optimizingApplication');",
    "reasonCategory": "usageTrusted",
    "updated": "2021-09-17T21:02:59.414Z"
  },
--- a/ts/util/lint/linter.ts
+++ b/ts/util/lint/linter.ts
@ -24,8 +24,7 @@ const excludedFilesRegexp = RegExp(
  [
    '^release/',
    '^preload.bundle.js(LICENSE.txt|map)?',
-    '^about.browser.bundle.js(LICENSE.txt|map)?',
-    '^about.preload.bundle.js(LICENSE.txt|map)?',
+    '^bundles/',
    '^storybook-static/',

    // Non-distributed files
--- a/ts/util/os/osMain.ts
+++ b/ts/util/os/osMain.ts
@ -0,0 +1,9 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import os from 'os';
+import { getOSFunctions } from './shared';
+
+const OS = getOSFunctions(os.release());
+
+export default OS;
--- a/ts/util/os/osPreload.ts
+++ b/ts/util/os/osPreload.ts
@ -0,0 +1,9 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { config } from '../../context/config';
+import { getOSFunctions } from './shared';
+
+const OS = getOSFunctions(config.osRelease);
+
+export default OS;
--- a/ts/util/os/shared.ts
+++ b/ts/util/os/shared.ts
@ -0,0 +1,68 @@
+// Copyright 2018 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import semver from 'semver';
+
+function createIsPlatform(
+  platform: typeof process.platform,
+  osRelease: string
+): (minVersion?: string) => boolean {
+  return minVersion => {
+    if (process.platform !== platform) {
+      return false;
+    }
+    if (minVersion === undefined) {
+      return true;
+    }
+
+    return semver.gte(osRelease, minVersion);
+  };
+}
+
+export type OSType = {
+  getClassName: () => string;
+  getName: () => string;
+  hasCustomTitleBar: () => boolean;
+  isLinux: (minVersion?: string) => boolean;
+  isMacOS: (minVersion?: string) => boolean;
+  isWindows: (minVersion?: string) => boolean;
+};
+
+export function getOSFunctions(osRelease: string): OSType {
+  const isMacOS = createIsPlatform('darwin', osRelease);
+  const isLinux = createIsPlatform('linux', osRelease);
+  const isWindows = createIsPlatform('win32', osRelease);
+
+  // Windows 10 and above
+  const hasCustomTitleBar = (): boolean =>
+    isWindows('10.0.0') || Boolean(process.env.CUSTOM_TITLEBAR);
+
+  const getName = (): string => {
+    if (isMacOS()) {
+      return 'macOS';
+    }
+    if (isWindows()) {
+      return 'Windows';
+    }
+    return 'Linux';
+  };
+
+  const getClassName = (): string => {
+    if (isMacOS()) {
+      return 'os-macos';
+    }
+    if (isWindows()) {
+      return 'os-windows';
+    }
+    return 'os-linux';
+  };
+
+  return {
+    getClassName,
+    getName,
+    hasCustomTitleBar,
+    isLinux,
+    isMacOS,
+    isWindows,
+  };
+}
--- a/ts/util/setupI18n.ts
+++ b/ts/util/setupI18n.ts
@ -172,6 +172,7 @@ export function setupI18n(
    return legacyMessages[key] != null;
  };
  getMessage.getLocale = () => locale;
+  getMessage.getLocaleMessages = () => messages;
  getMessage.getLocaleDirection = () => {
    return window.getResolvedMessagesLocaleDirection();
  };
--- a/ts/util/throttle.ts
+++ b/ts/util/throttle.ts
@ -0,0 +1,70 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+// eslint-disable-next-line @typescript-eslint/ban-types
+export function throttle(func: Function, wait: number): () => void {
+  let lastCallTime: number;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  let lastArgs: Array<any> | undefined;
+  let timerId: NodeJS.Timeout | undefined;
+
+  function call() {
+    const args = lastArgs || [];
+    lastArgs = undefined;
+    func(...args);
+  }
+
+  function leading() {
+    timerId = setTimeout(timerExpired, wait);
+    call();
+  }
+
+  function remainingWait(time: number) {
+    const timeSinceLastCall = time - lastCallTime;
+    return wait - timeSinceLastCall;
+  }
+
+  function shouldInvoke(time: number) {
+    const timeSinceLastCall = time - lastCallTime;
+
+    return (
+      lastCallTime === undefined ||
+      timeSinceLastCall >= wait ||
+      timeSinceLastCall < 0
+    );
+  }
+
+  function timerExpired() {
+    const time = Date.now();
+    if (shouldInvoke(time)) {
+      return trailing();
+    }
+    timerId = setTimeout(timerExpired, remainingWait(time));
+  }
+
+  function trailing() {
+    timerId = undefined;
+
+    if (lastArgs) {
+      return call();
+    }
+    lastArgs = undefined;
+  }
+
+  return (...args) => {
+    const time = Date.now();
+    const isInvoking = shouldInvoke(time);
+
+    lastArgs = args;
+    lastCallTime = time;
+
+    if (isInvoking) {
+      if (timerId === undefined) {
+        return leading();
+      }
+    }
+    if (timerId === undefined) {
+      timerId = setTimeout(timerExpired, wait);
+    }
+  };
+}
--- a/ts/util/version.ts
+++ b/ts/util/version.ts
@ -2,7 +2,6 @@
 // SPDX-License-Identifier: AGPL-3.0-only

 import * as semver from 'semver';
-import moment from 'moment';

 export const isProduction = (version: string): boolean => {
  const parsed = semver.parse(version);
@ -34,7 +33,22 @@ export const generateAlphaVersion = (options: {
    throw new Error(`generateAlphaVersion: Invalid version ${currentVersion}`);
  }

-  const formattedDate = moment().utc().format('YYYYMMDD.HH');
+  const dateTimeParts = new Intl.DateTimeFormat('en', {
+    day: '2-digit',
+    hour: '2-digit',
+    hourCycle: 'h23',
+    month: '2-digit',
+    timeZone: 'GMT',
+    year: 'numeric',
+  }).formatToParts(new Date());
+  const dateTimeMap = new Map();
+  dateTimeParts.forEach(({ type, value }) => {
+    dateTimeMap.set(type, value);
+  });
+  const formattedDate = `${dateTimeMap.get('year')}${dateTimeMap.get(
+    'month'
+  )}${dateTimeMap.get('day')}.${dateTimeMap.get('hour')}`;
+
  const formattedVersion = `${parsed.major}.${parsed.minor}.${parsed.patch}`;

  return `${formattedVersion}-alpha.${formattedDate}-${shortSha}`;
--- a/ts/util/windowsZoneIdentifier.ts
+++ b/ts/util/windowsZoneIdentifier.ts
@ -2,7 +2,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only

 import * as fs from 'fs';
-import { isWindows } from '../OS';
+import OS from './os/osMain';

 const ZONE_IDENTIFIER_CONTENTS = Buffer.from('[ZoneTransfer]\r\nZoneId=3');

@ -27,7 +27,7 @@ const ZONE_IDENTIFIER_CONTENTS = Buffer.from('[ZoneTransfer]\r\nZoneId=3');
 export async function writeWindowsZoneIdentifier(
  filePath: string
 ): Promise<void> {
-  if (!isWindows()) {
+  if (!OS.isWindows()) {
    throw new Error('writeWindowsZoneIdentifier should only run on Windows');
  }

--- a/ts/window.d.ts
+++ b/ts/window.d.ts
@ -3,7 +3,6 @@

 // Captures the globals put in place by preload.js, background.js and others

-import type { MenuItemConstructorOptions } from 'electron';
 import type { Store } from 'redux';
 import type * as Backbone from 'backbone';
 import type PQueue from 'p-queue/dist';
@ -28,7 +27,7 @@ import type * as Groups from './groups';
 import type * as Crypto from './Crypto';
 import type * as Curve from './Curve';
 import type * as RemoteConfig from './RemoteConfig';
-import type * as OS from './OS';
+import type { OSType } from './util/os/shared';
 import type { getEnvironment } from './environment';
 import type { LocalizerType, ThemeType } from './types/Util';
 import type { Receipt } from './types/Receipt';
@ -56,6 +55,7 @@ import type { SignalContextType } from './windows/context';
 import type * as Message2 from './types/Message2';
 import type { initializeMigrations } from './signal';
 import type { RetryPlaceholders } from './util/retryPlaceholders';
+import type { PropsPreloadType as PreferencesPropsType } from './components/Preferences';
 import type { LocaleDirection } from '../app/locale';

 export { Long } from 'long';
@ -103,21 +103,46 @@ export type FeatureFlagType = {
  GV2_MIGRATION_DISABLE_INVITE: boolean;
 };

-type AboutWindowType = {
+type AboutWindowPropsType = {
+  arch: string;
  environmentText: string;
-  executeMenuRole: (role: MenuItemConstructorOptions['role']) => Promise<void>;
-  hasCustomTitleBar: boolean;
-  i18n: LocalizerType;
-  version: string;
+  platform: string;
+};
+
+type DebugLogWindowPropsType = {
+  downloadLog: (text: string) => unknown;
+  fetchLogs: () => Promise<string>;
+  uploadLogs: (text: string) => Promise<string>;
+};
+
+type PermissionsWindowPropsType = {
+  forCamera: boolean;
+  forCalling: boolean;
+  onAccept: () => void;
+  onClose: () => void;
+};
+
+type ScreenShareWindowPropsType = {
+  onStopSharing: () => void;
+  presentedSourceName: string;
+};
+
+type SettingsOnRenderCallbackType = (props: PreferencesPropsType) => void;
+
+type SettingsWindowPropsType = {
+  onRender: (callback: SettingsOnRenderCallbackType) => void;
 };

 export type SignalCoreType = {
-  AboutWindow?: AboutWindowType;
+  AboutWindowProps?: AboutWindowPropsType;
  Crypto: typeof Crypto;
  Curve: typeof Curve;
  Data: typeof Data;
+  DebugLogWindowProps?: DebugLogWindowPropsType;
  Groups: typeof Groups;
+  PermissionsWindowProps?: PermissionsWindowPropsType;
  RemoteConfig: typeof RemoteConfig;
+  ScreenShareWindowProps?: ScreenShareWindowPropsType;
  Services: {
    calling: CallingClass;
    initializeGroupCredentialFetcher: () => Promise<void>;
@ -127,6 +152,7 @@ export type SignalCoreType = {
    lightSessionResetQueue?: PQueue;
    storage: typeof StorageService;
  };
+  SettingsWindowProps?: SettingsWindowPropsType;
  Migrations: ReturnType<typeof initializeMigrations>;
  Types: {
    Message: typeof Message2;
@ -137,7 +163,7 @@ export type SignalCoreType = {
  Components: {
    ConfirmationDialog: typeof ConfirmationDialog;
  };
-  OS: typeof OS;
+  OS: OSType;
  State: {
    createStore: typeof createStore;
    Roots: {
--- a/ts/windows/about/app.tsx
+++ b/ts/windows/about/app.tsx
@ -5,20 +5,32 @@ import React from 'react';
 import ReactDOM from 'react-dom';

 import { About } from '../../components/About';
+import { i18n } from '../sandboxedInit';
 import { strictAssert } from '../../util/assert';

-const { AboutWindow } = window.Signal;
+const { AboutWindowProps } = window.Signal;

-strictAssert(AboutWindow, 'window values not provided');
+strictAssert(AboutWindowProps, 'window values not provided');
+
+let platform = '';
+if (AboutWindowProps.platform === 'darwin') {
+  if (AboutWindowProps.arch === 'arm64') {
+    platform = ` (${window.i18n('icu:appleSilicon')})`;
+  } else {
+    platform = ' (Intel)';
+  }
+}
+
+const environmentText = `${AboutWindowProps.environmentText}${platform}`;

 ReactDOM.render(
  <About
-    closeAbout={() => AboutWindow.executeMenuRole('close')}
-    environment={AboutWindow.environmentText}
-    executeMenuRole={AboutWindow.executeMenuRole}
-    hasCustomTitleBar={AboutWindow.hasCustomTitleBar}
-    i18n={AboutWindow.i18n}
-    version={AboutWindow.version}
+    closeAbout={() => window.SignalContext.executeMenuRole('close')}
+    environment={environmentText}
+    executeMenuRole={window.SignalContext.executeMenuRole}
+    hasCustomTitleBar={window.SignalContext.OS.hasCustomTitleBar()}
+    i18n={i18n}
+    version={window.SignalContext.getVersion()}
  />,
  document.getElementById('app')
 );
--- a/ts/windows/about/preload.ts
+++ b/ts/windows/about/preload.ts
@ -1,22 +1,10 @@
 // Copyright 2018 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import type { MenuItemConstructorOptions } from 'electron';
-import { contextBridge, ipcRenderer } from 'electron';
-import { activeWindowService } from '../../context/activeWindowService';
+import { contextBridge } from 'electron';
+import { MinimalSignalContext } from '../minimalContext';
 import { config } from '../../context/config';
-import { createNativeThemeListener } from '../../context/createNativeThemeListener';
-import { createSetting } from '../../util/preload';
 import { environment } from '../../context/environment';
-import { getClassName } from '../../OS';
-import { i18n } from '../../context/i18n';
-import { waitForSettingsChange } from '../../context/waitForSettingsChange';
-
-async function executeMenuRole(
-  role: MenuItemConstructorOptions['role']
-): Promise<void> {
-  await ipcRenderer.invoke('executeMenuRole', role);
-}

 const environments: Array<string> = [environment];

@ -24,40 +12,12 @@ if (config.appInstance) {
  environments.push(String(config.appInstance));
 }

-let platform = '';
-if (process.platform === 'darwin') {
-  if (process.arch === 'arm64') {
-    platform = ` (${i18n('icu:appleSilicon')})`;
-  } else {
-    platform = ' (Intel)';
-  }
-}
-
-const environmentText = `${environments.join(' - ')}${platform}`;
-const hasCustomTitleBar = ipcRenderer.sendSync('getHasCustomTitleBar');
-
 const Signal = {
-  AboutWindow: {
-    environmentText,
-    executeMenuRole,
-    hasCustomTitleBar,
-    i18n,
-    version: String(config.version),
+  AboutWindowProps: {
+    arch: process.arch,
+    environmentText: environments.join(' - '),
+    platform: process.platform,
  },
 };
 contextBridge.exposeInMainWorld('Signal', Signal);
-
-// TODO DESKTOP-5054
-const SignalContext = {
-  activeWindowService,
-  OS: {
-    getClassName,
-    hasCustomTitleBar: () => hasCustomTitleBar,
-  },
-  Settings: {
-    themeSetting: createSetting('themeSetting', { setter: false }),
-    waitForChange: waitForSettingsChange,
-  },
-  nativeThemeListener: createNativeThemeListener(ipcRenderer, window),
-};
-contextBridge.exposeInMainWorld('SignalContext', SignalContext);
+contextBridge.exposeInMainWorld('SignalContext', MinimalSignalContext);
--- a/ts/windows/attachments.ts
+++ b/ts/windows/attachments.ts
@ -12,7 +12,7 @@ import * as Bytes from '../Bytes';

 import { isPathInside } from '../util/isPathInside';
 import { writeWindowsZoneIdentifier } from '../util/windowsZoneIdentifier';
-import { isWindows } from '../OS';
+import OS from '../util/os/osMain';

 export * from '../../app/attachments';

@ -229,7 +229,7 @@ async function writeWithAttributes(
    const attrValue = `${type};${timestamp};${appName};${guid}`;

    await xattr.set(target, 'com.apple.quarantine', attrValue);
-  } else if (isWindows()) {
+  } else if (OS.isWindows()) {
    // This operation may fail (see the function's comments), which is not a show-stopper.
    try {
      await writeWindowsZoneIdentifier(target);
--- a/ts/windows/context.ts
+++ b/ts/windows/context.ts
@ -8,7 +8,6 @@ import type { MenuOptionsType, MenuActionType } from '../types/menu';
 import type { IPCEventsValuesType } from '../util/createIPCEvents';
 import type { LocalizerType } from '../types/Util';
 import type { LoggerType } from '../types/Logging';
-import type { LocaleMessagesType } from '../types/I18N';
 import type { NativeThemeType } from '../context/createNativeThemeListener';
 import type { SettingType } from '../util/preload';
 import type { RendererConfigType } from '../types/RendererConfig';
@ -18,29 +17,10 @@ import { Crypto } from '../context/Crypto';
 import { Timers } from '../context/Timers';

 import type { ActiveWindowServiceType } from '../services/ActiveWindowService';
-import { config } from '../context/config';
 import { i18n } from '../context/i18n';
-import { activeWindowService } from '../context/activeWindowService';
-import {
-  getEnvironment,
-  parseEnvironment,
-  setEnvironment,
-} from '../environment';
 import { strictAssert } from '../util/assert';
-import { createSetting } from '../util/preload';
 import { initialize as initializeLogging } from '../logging/set_up_renderer_logging';
-import { waitForSettingsChange } from '../context/waitForSettingsChange';
-import { createNativeThemeListener } from '../context/createNativeThemeListener';
-import {
-  isWindows,
-  isLinux,
-  isMacOS,
-  hasCustomTitleBar,
-  getClassName,
-} from '../OS';
-
-const localeMessages = ipcRenderer.sendSync('locale-data');
-setEnvironment(parseEnvironment(config.environment));
+import { MinimalSignalContext } from './minimalContext';

 strictAssert(Boolean(window.SignalContext), 'context must be defined');

@ -51,89 +31,53 @@ export type MainWindowStatsType = Readonly<{
  isFullScreen: boolean;
 }>;

-export type SignalContextType = {
-  bytes: Bytes;
-  crypto: Crypto;
-  timers: Timers;
-  nativeThemeListener: NativeThemeType;
-  setIsCallActive: (isCallActive: boolean) => unknown;
-
+export type MinimalSignalContextType = {
  activeWindowService: ActiveWindowServiceType;
+  config: RendererConfigType;
+  executeMenuAction: (action: MenuActionType) => Promise<void>;
+  executeMenuRole: (role: MenuItemConstructorOptions['role']) => Promise<void>;
+  getAppInstance: () => string | undefined;
+  getEnvironment: () => string;
+  getI18nLocale: LocalizerType['getLocale'];
+  getI18nLocaleMessages: LocalizerType['getLocaleMessages'];
+  getMainWindowStats: () => Promise<MainWindowStatsType>;
+  getMenuOptions: () => Promise<MenuOptionsType>;
+  getNodeVersion: () => string;
+  getPath: (name: 'userData' | 'home') => string;
+  getVersion: () => string;
+  nativeThemeListener: NativeThemeType;
  Settings: {
    themeSetting: SettingType<IPCEventsValuesType['themeSetting']>;
    waitForChange: () => Promise<void>;
  };
  OS: {
+    hasCustomTitleBar: () => boolean;
+    getClassName: () => string;
    platform: string;
-    isWindows: typeof isWindows;
-    isLinux: typeof isLinux;
-    isMacOS: typeof isMacOS;
-    hasCustomTitleBar: typeof hasCustomTitleBar;
-    getClassName: typeof getClassName;
+    release: string;
  };
-  config: RendererConfigType;
-  getAppInstance: () => string | undefined;
-  getEnvironment: () => string;
-  getNodeVersion: () => string;
-  getVersion: () => string;
-  getPath: (name: 'userData' | 'home') => string;
-  i18n: LocalizerType;
-  localeMessages: LocaleMessagesType;
-  log: LoggerType;
-  renderWindow?: () => void;
-  executeMenuRole: (role: MenuItemConstructorOptions['role']) => Promise<void>;
-  getMainWindowStats: () => Promise<MainWindowStatsType>;
-  getMenuOptions: () => Promise<MenuOptionsType>;
-  executeMenuAction: (action: MenuActionType) => Promise<void>;
 };

+export type SignalContextType = {
+  bytes: Bytes;
+  crypto: Crypto;
+  i18n: LocalizerType;
+  log: LoggerType;
+  renderWindow?: () => void;
+  setIsCallActive: (isCallActive: boolean) => unknown;
+  timers: Timers;
+} & MinimalSignalContextType;
+
 export const SignalContext: SignalContextType = {
-  activeWindowService,
-  Settings: {
-    themeSetting: createSetting('themeSetting', { setter: false }),
-    waitForChange: waitForSettingsChange,
-  },
-  OS: {
-    platform: process.platform,
-    isWindows,
-    isLinux,
-    isMacOS,
-    hasCustomTitleBar,
-    getClassName,
-  },
+  ...MinimalSignalContext,
  bytes: new Bytes(),
-  config,
  crypto: new Crypto(),
-  getAppInstance: (): string | undefined =>
-    config.appInstance ? String(config.appInstance) : undefined,
-  getEnvironment,
-  getNodeVersion: (): string => String(config.nodeVersion),
-  getVersion: (): string => String(config.version),
-  getPath: (name: 'userData' | 'home'): string => {
-    return String(config[`${name}Path`]);
-  },
  i18n,
-  localeMessages,
  log: window.SignalContext.log,
-  nativeThemeListener: createNativeThemeListener(ipcRenderer, window),
  setIsCallActive(isCallActive: boolean): void {
    ipcRenderer.send('set-is-call-active', isCallActive);
  },
  timers: new Timers(),
-  async executeMenuRole(
-    role: MenuItemConstructorOptions['role']
-  ): Promise<void> {
-    await ipcRenderer.invoke('executeMenuRole', role);
-  },
-  async getMainWindowStats(): Promise<MainWindowStatsType> {
-    return ipcRenderer.invoke('getMainWindowStats');
-  },
-  async getMenuOptions(): Promise<MenuOptionsType> {
-    return ipcRenderer.invoke('getMenuOptions');
-  },
-  async executeMenuAction(action: MenuActionType): Promise<void> {
-    return ipcRenderer.invoke('executeMenuAction', action);
-  },
 };

 window.SignalContext = SignalContext;
--- a/ts/windows/debuglog/app.tsx
+++ b/ts/windows/debuglog/app.tsx
@ -0,0 +1,25 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import { render } from 'react-dom';
+import { DebugLogWindow } from '../../components/DebugLogWindow';
+import { i18n } from '../sandboxedInit';
+import { strictAssert } from '../../util/assert';
+
+const { DebugLogWindowProps } = window.Signal;
+
+strictAssert(DebugLogWindowProps, 'window values not provided');
+
+render(
+  <DebugLogWindow
+    hasCustomTitleBar={window.SignalContext.OS.hasCustomTitleBar()}
+    executeMenuRole={window.SignalContext.executeMenuRole}
+    closeWindow={() => window.SignalContext.executeMenuRole('close')}
+    downloadLog={DebugLogWindowProps.downloadLog}
+    i18n={i18n}
+    fetchLogs={DebugLogWindowProps.fetchLogs}
+    uploadLogs={DebugLogWindowProps.uploadLogs}
+  />,
+  document.getElementById('app')
+);
--- a/ts/windows/debuglog/preload.ts
+++ b/ts/windows/debuglog/preload.ts
@ -1,49 +1,32 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import React from 'react';
-import ReactDOM from 'react-dom';
 import { contextBridge, ipcRenderer } from 'electron';
+import { MinimalSignalContext } from '../minimalContext';

-import { SignalContext } from '../context';
-import { DebugLogWindow } from '../../components/DebugLogWindow';
-import * as debugLog from '../../logging/debuglogs';
-import { upload } from '../../logging/uploadDebugLog';
-import * as logger from '../../logging/log';
+function downloadLog(logText: string) {
+  ipcRenderer.send('show-debug-log-save-dialog', logText);
+}

-contextBridge.exposeInMainWorld('SignalContext', {
-  ...SignalContext,
-  renderWindow: () => {
-    const environmentText: Array<string> = [SignalContext.getEnvironment()];
+async function fetchLogs() {
+  const data = await ipcRenderer.invoke('fetch-log');
+  return ipcRenderer.invoke(
+    'DebugLogs.getLogs',
+    data,
+    window.navigator.userAgent
+  );
+}

-    const appInstance = SignalContext.getAppInstance();
-    if (appInstance) {
-      environmentText.push(appInstance);
-    }
+function uploadLogs(logs: string) {
+  return ipcRenderer.invoke('DebugLogs.upload', logs);
+}

-    ReactDOM.render(
-      React.createElement(DebugLogWindow, {
-        hasCustomTitleBar: SignalContext.OS.hasCustomTitleBar(),
-        executeMenuRole: SignalContext.executeMenuRole,
-        closeWindow: () => SignalContext.executeMenuRole('close'),
-        downloadLog: (logText: string) =>
-          ipcRenderer.send('show-debug-log-save-dialog', logText),
-        i18n: SignalContext.i18n,
-        fetchLogs() {
-          return debugLog.fetch(
-            SignalContext.getNodeVersion(),
-            SignalContext.getVersion()
-          );
-        },
-        uploadLogs(logs: string) {
-          return upload({
-            content: logs,
-            appVersion: SignalContext.getVersion(),
-            logger,
-          });
-        },
-      }),
-      document.getElementById('app')
-    );
+const Signal = {
+  DebugLogWindowProps: {
+    downloadLog,
+    fetchLogs,
+    uploadLogs,
  },
-});
+};
+contextBridge.exposeInMainWorld('Signal', Signal);
+contextBridge.exposeInMainWorld('SignalContext', MinimalSignalContext);
--- a/ts/windows/loading/preload.ts
+++ b/ts/windows/loading/preload.ts
@ -2,7 +2,10 @@
 // SPDX-License-Identifier: AGPL-3.0-only

 import { contextBridge } from 'electron';
+import { config } from '../../context/config';
+import { localeMessages } from '../../context/localeMessages';

-import { SignalContext } from '../context';
-
-contextBridge.exposeInMainWorld('SignalContext', SignalContext);
+contextBridge.exposeInMainWorld('SignalContext', {
+  getI18nLocale: () => config.resolvedTranslationsLocale,
+  getI18nLocaleMessages: () => localeMessages,
+});
--- a/ts/windows/loading/start.ts
+++ b/ts/windows/loading/start.ts
@ -1,7 +1,14 @@
 // Copyright 2020 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

+import { setupI18n } from '../../util/setupI18n';
+
+window.i18n = setupI18n(
+  window.SignalContext.getI18nLocale(),
+  window.SignalContext.getI18nLocaleMessages()
+);
+
 const message = document.getElementById('message');
 if (message) {
-  message.innerHTML = window.SignalContext.i18n('icu:optimizingApplication');
+  message.innerHTML = window.i18n('icu:optimizingApplication');
 }
--- a/ts/windows/minimalContext.ts
+++ b/ts/windows/minimalContext.ts
@ -0,0 +1,56 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { MenuItemConstructorOptions } from 'electron';
+import { ipcRenderer } from 'electron';
+
+import type { MenuOptionsType, MenuActionType } from '../types/menu';
+import type { MainWindowStatsType, MinimalSignalContextType } from './context';
+import { activeWindowService } from '../context/activeWindowService';
+import { config } from '../context/config';
+import { createNativeThemeListener } from '../context/createNativeThemeListener';
+import { createSetting } from '../util/preload';
+import { environment } from '../context/environment';
+import { localeMessages } from '../context/localeMessages';
+import { waitForSettingsChange } from '../context/waitForSettingsChange';
+
+const hasCustomTitleBar = ipcRenderer.sendSync('OS.getHasCustomTitleBar');
+export const MinimalSignalContext: MinimalSignalContextType = {
+  activeWindowService,
+  config,
+  async executeMenuAction(action: MenuActionType): Promise<void> {
+    return ipcRenderer.invoke('executeMenuAction', action);
+  },
+  async executeMenuRole(
+    role: MenuItemConstructorOptions['role']
+  ): Promise<void> {
+    await ipcRenderer.invoke('executeMenuRole', role);
+  },
+  getAppInstance: (): string | undefined =>
+    config.appInstance ? String(config.appInstance) : undefined,
+  getEnvironment: () => environment,
+  getNodeVersion: (): string => String(config.nodeVersion),
+  getPath: (name: 'userData' | 'home'): string => {
+    return String(config[`${name}Path`]);
+  },
+  getVersion: (): string => String(config.version),
+  async getMainWindowStats(): Promise<MainWindowStatsType> {
+    return ipcRenderer.invoke('getMainWindowStats');
+  },
+  async getMenuOptions(): Promise<MenuOptionsType> {
+    return ipcRenderer.invoke('getMenuOptions');
+  },
+  getI18nLocale: () => config.resolvedTranslationsLocale,
+  getI18nLocaleMessages: () => localeMessages,
+  nativeThemeListener: createNativeThemeListener(ipcRenderer, window),
+  OS: {
+    getClassName: () => ipcRenderer.sendSync('OS.getClassName'),
+    hasCustomTitleBar: () => hasCustomTitleBar,
+    platform: process.platform,
+    release: config.osRelease,
+  },
+  Settings: {
+    themeSetting: createSetting('themeSetting', { setter: false }),
+    waitForChange: waitForSettingsChange,
+  },
+};
--- a/ts/windows/permissions/app.tsx
+++ b/ts/windows/permissions/app.tsx
@ -0,0 +1,36 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import ReactDOM from 'react-dom';
+
+import { PermissionsPopup } from '../../components/PermissionsPopup';
+import { i18n } from '../sandboxedInit';
+import { strictAssert } from '../../util/assert';
+
+const { PermissionsWindowProps } = window.Signal;
+
+strictAssert(PermissionsWindowProps, 'window values not provided');
+
+const { forCalling, forCamera } = PermissionsWindowProps;
+
+let message;
+if (forCalling) {
+  if (forCamera) {
+    message = i18n('icu:videoCallingPermissionNeeded');
+  } else {
+    message = i18n('icu:audioCallingPermissionNeeded');
+  }
+} else {
+  message = i18n('icu:audioPermissionNeeded');
+}
+
+ReactDOM.render(
+  <PermissionsPopup
+    i18n={i18n}
+    message={message}
+    onAccept={PermissionsWindowProps.onAccept}
+    onClose={PermissionsWindowProps.onClose}
+  />,
+  document.getElementById('app')
+);
--- a/ts/windows/permissions/preload.ts
+++ b/ts/windows/permissions/preload.ts
@ -1,14 +1,10 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import React from 'react';
-import ReactDOM from 'react-dom';
 import { contextBridge } from 'electron';
-
-import { SignalContext } from '../context';
-
+import { MinimalSignalContext } from '../minimalContext';
 import { createSetting } from '../../util/preload';
-import { PermissionsPopup } from '../../components/PermissionsPopup';
+import { drop } from '../../util/drop';

 const mediaCameraPermissions = createSetting('mediaCameraPermissions', {
  getter: false,
@ -17,48 +13,28 @@ const mediaPermissions = createSetting('mediaPermissions', {
  getter: false,
 });

-contextBridge.exposeInMainWorld(
-  'nativeThemeListener',
-  window.SignalContext.nativeThemeListener
-);
+const params = new URLSearchParams(document.location.search);
+const forCalling = params.get('forCalling') === 'true';
+const forCamera = params.get('forCamera') === 'true';

-contextBridge.exposeInMainWorld('SignalContext', {
-  ...SignalContext,
-  renderWindow: () => {
-    const params = new URLSearchParams(document.location.search);
-    const forCalling = params.get('forCalling') === 'true';
-    const forCamera = params.get('forCamera') === 'true';
+function onClose() {
+  drop(MinimalSignalContext.executeMenuRole('close'));
+}

-    let message;
-    if (forCalling) {
-      if (forCamera) {
-        message = SignalContext.i18n('icu:videoCallingPermissionNeeded');
+const Signal = {
+  PermissionsWindowProps: {
+    forCalling,
+    forCamera,
+    onAccept: () => {
+      if (!forCamera) {
+        drop(mediaPermissions.setValue(true));
      } else {
-        message = SignalContext.i18n('icu:audioCallingPermissionNeeded');
+        drop(mediaCameraPermissions.setValue(true));
      }
-    } else {
-      message = SignalContext.i18n('icu:audioPermissionNeeded');
-    }
-
-    function onClose() {
-      void SignalContext.executeMenuRole('close');
-    }
-
-    ReactDOM.render(
-      React.createElement(PermissionsPopup, {
-        i18n: SignalContext.i18n,
-        message,
-        onAccept: () => {
-          if (!forCamera) {
-            void mediaPermissions.setValue(true);
-          } else {
-            void mediaCameraPermissions.setValue(true);
-          }
-          onClose();
-        },
-        onClose,
-      }),
-      document.getElementById('app')
-    );
+      onClose();
+    },
+    onClose,
  },
-});
+};
+contextBridge.exposeInMainWorld('Signal', Signal);
+contextBridge.exposeInMainWorld('SignalContext', MinimalSignalContext);
--- a/ts/windows/sandboxedInit.ts
+++ b/ts/windows/sandboxedInit.ts
@ -0,0 +1,15 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import './applyTheme';
+import { setupI18n } from '../util/setupI18n';
+
+document.body.classList.add(window.SignalContext.OS.getClassName());
+if (window.SignalContext.OS.hasCustomTitleBar()) {
+  document.body.classList.add('os-has-custom-titlebar');
+}
+
+export const i18n = setupI18n(
+  window.SignalContext.getI18nLocale(),
+  window.SignalContext.getI18nLocaleMessages()
+);
--- a/ts/windows/screenShare/app.tsx
+++ b/ts/windows/screenShare/app.tsx
@ -0,0 +1,24 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import ReactDOM from 'react-dom';
+
+import { CallingScreenSharingController } from '../../components/CallingScreenSharingController';
+import { i18n } from '../sandboxedInit';
+import { strictAssert } from '../../util/assert';
+
+const { ScreenShareWindowProps } = window.Signal;
+
+strictAssert(ScreenShareWindowProps, 'window values not provided');
+
+ReactDOM.render(
+  <CallingScreenSharingController
+    i18n={i18n}
+    onCloseController={() => window.SignalContext.executeMenuRole('close')}
+    onStopSharing={ScreenShareWindowProps.onStopSharing}
+    presentedSourceName={ScreenShareWindowProps.presentedSourceName}
+  />,
+
+  document.getElementById('app')
+);
--- a/ts/windows/screenShare/preload.ts
+++ b/ts/windows/screenShare/preload.ts
@ -1,29 +1,18 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import React from 'react';
-import ReactDOM from 'react-dom';
 import { contextBridge, ipcRenderer } from 'electron';
+import { MinimalSignalContext } from '../minimalContext';

-import { SignalContext } from '../context';
-import { CallingScreenSharingController } from '../../components/CallingScreenSharingController';
+const params = new URLSearchParams(document.location.search);

-contextBridge.exposeInMainWorld('SignalContext', SignalContext);
-
-function renderScreenSharingController(presentedSourceName: string): void {
-  ReactDOM.render(
-    React.createElement(CallingScreenSharingController, {
-      platform: process.platform,
-      executeMenuRole: SignalContext.executeMenuRole,
-      i18n: SignalContext.i18n,
-      onCloseController: () => SignalContext.executeMenuRole('close'),
-      onStopSharing: () => ipcRenderer.send('stop-screen-share'),
-      presentedSourceName,
-    }),
-    document.getElementById('app')
-  );
-}
-
-ipcRenderer.once('render-screen-sharing-controller', (_, name: string) => {
-  renderScreenSharingController(name);
-});
+const Signal = {
+  ScreenShareWindowProps: {
+    onStopSharing: () => {
+      ipcRenderer.send('stop-screen-share');
+    },
+    presentedSourceName: params.get('sourceName'),
+  },
+};
+contextBridge.exposeInMainWorld('Signal', Signal);
+contextBridge.exposeInMainWorld('SignalContext', MinimalSignalContext);
--- a/ts/windows/settings/app.tsx
+++ b/ts/windows/settings/app.tsx
@ -0,0 +1,221 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import ReactDOM from 'react-dom';
+
+import type { PropsPreloadType } from '../../components/Preferences';
+import { i18n } from '../sandboxedInit';
+import { Preferences } from '../../components/Preferences';
+import { startInteractionMode } from '../../services/InteractionMode';
+import { strictAssert } from '../../util/assert';
+
+const { SettingsWindowProps } = window.Signal;
+
+strictAssert(SettingsWindowProps, 'window values not provided');
+
+startInteractionMode();
+
+SettingsWindowProps.onRender(
+  ({
+    addCustomColor,
+    availableCameras,
+    availableMicrophones,
+    availableSpeakers,
+    blockedCount,
+    closeSettings,
+    customColors,
+    defaultConversationColor,
+    deviceName,
+    doDeleteAllData,
+    doneRendering,
+    editCustomColor,
+    executeMenuRole,
+    getConversationsWithCustomColor,
+    hasAudioNotifications,
+    hasAutoDownloadUpdate,
+    hasAutoLaunch,
+    hasCallNotifications,
+    hasCallRingtoneNotification,
+    hasCountMutedConversations,
+    hasCustomTitleBar,
+    hasHideMenuBar,
+    hasIncomingCallNotifications,
+    hasLinkPreviews,
+    hasMediaCameraPermissions,
+    hasMediaPermissions,
+    hasMinimizeToAndStartInSystemTray,
+    hasMinimizeToSystemTray,
+    hasNotificationAttention,
+    hasNotifications,
+    hasReadReceipts,
+    hasRelayCalls,
+    hasSpellCheck,
+    hasStoriesDisabled,
+    hasTextFormatting,
+    hasTypingIndicators,
+    initialSpellCheckSetting,
+    isAudioNotificationsSupported,
+    isAutoDownloadUpdatesSupported,
+    isAutoLaunchSupported,
+    isFormattingFlagEnabled,
+    isHideMenuBarSupported,
+    isMinimizeToAndStartInSystemTraySupported,
+    isNotificationAttentionSupported,
+    isPhoneNumberSharingSupported,
+    isSyncSupported,
+    isSystemTraySupported,
+    lastSyncTime,
+    makeSyncRequest,
+    notificationContent,
+    onAudioNotificationsChange,
+    onAutoDownloadUpdateChange,
+    onAutoLaunchChange,
+    onCallNotificationsChange,
+    onCallRingtoneNotificationChange,
+    onCountMutedConversationsChange,
+    onHasStoriesDisabledChanged,
+    onHideMenuBarChange,
+    onIncomingCallNotificationsChange,
+    onLastSyncTimeChange,
+    onMediaCameraPermissionsChange,
+    onMediaPermissionsChange,
+    onMinimizeToAndStartInSystemTrayChange,
+    onMinimizeToSystemTrayChange,
+    onNotificationAttentionChange,
+    onNotificationContentChange,
+    onNotificationsChange,
+    onRelayCallsChange,
+    onSelectedCameraChange,
+    onSelectedMicrophoneChange,
+    onSelectedSpeakerChange,
+    onSentMediaQualityChange,
+    onSpellCheckChange,
+    onTextFormattingChange,
+    onThemeChange,
+    onUniversalExpireTimerChange,
+    onWhoCanFindMeChange,
+    onWhoCanSeeMeChange,
+    onZoomFactorChange,
+    removeCustomColor,
+    removeCustomColorOnConversations,
+    resetAllChatColors,
+    resetDefaultChatColor,
+    selectedCamera,
+    selectedMicrophone,
+    selectedSpeaker,
+    sentMediaQualitySetting,
+    setGlobalDefaultConversationColor,
+    shouldShowStoriesSettings,
+    themeSetting,
+    universalExpireTimer,
+    whoCanFindMe,
+    whoCanSeeMe,
+    zoomFactor,
+  }: PropsPreloadType) => {
+    ReactDOM.render(
+      <Preferences
+        addCustomColor={addCustomColor}
+        availableCameras={availableCameras}
+        availableMicrophones={availableMicrophones}
+        availableSpeakers={availableSpeakers}
+        blockedCount={blockedCount}
+        closeSettings={closeSettings}
+        customColors={customColors}
+        defaultConversationColor={defaultConversationColor}
+        deviceName={deviceName}
+        doDeleteAllData={doDeleteAllData}
+        doneRendering={doneRendering}
+        editCustomColor={editCustomColor}
+        executeMenuRole={executeMenuRole}
+        getConversationsWithCustomColor={getConversationsWithCustomColor}
+        hasAudioNotifications={hasAudioNotifications}
+        hasAutoDownloadUpdate={hasAutoDownloadUpdate}
+        hasAutoLaunch={hasAutoLaunch}
+        hasCallNotifications={hasCallNotifications}
+        hasCallRingtoneNotification={hasCallRingtoneNotification}
+        hasCountMutedConversations={hasCountMutedConversations}
+        hasCustomTitleBar={hasCustomTitleBar}
+        hasHideMenuBar={hasHideMenuBar}
+        hasIncomingCallNotifications={hasIncomingCallNotifications}
+        hasLinkPreviews={hasLinkPreviews}
+        hasMediaCameraPermissions={hasMediaCameraPermissions}
+        hasMediaPermissions={hasMediaPermissions}
+        hasMinimizeToAndStartInSystemTray={hasMinimizeToAndStartInSystemTray}
+        hasMinimizeToSystemTray={hasMinimizeToSystemTray}
+        hasNotificationAttention={hasNotificationAttention}
+        hasNotifications={hasNotifications}
+        hasReadReceipts={hasReadReceipts}
+        hasRelayCalls={hasRelayCalls}
+        hasSpellCheck={hasSpellCheck}
+        hasStoriesDisabled={hasStoriesDisabled}
+        hasTextFormatting={hasTextFormatting}
+        hasTypingIndicators={hasTypingIndicators}
+        i18n={i18n}
+        initialSpellCheckSetting={initialSpellCheckSetting}
+        isAudioNotificationsSupported={isAudioNotificationsSupported}
+        isAutoDownloadUpdatesSupported={isAutoDownloadUpdatesSupported}
+        isAutoLaunchSupported={isAutoLaunchSupported}
+        isFormattingFlagEnabled={isFormattingFlagEnabled}
+        isHideMenuBarSupported={isHideMenuBarSupported}
+        isMinimizeToAndStartInSystemTraySupported={
+          isMinimizeToAndStartInSystemTraySupported
+        }
+        isNotificationAttentionSupported={isNotificationAttentionSupported}
+        isPhoneNumberSharingSupported={isPhoneNumberSharingSupported}
+        isSyncSupported={isSyncSupported}
+        isSystemTraySupported={isSystemTraySupported}
+        lastSyncTime={lastSyncTime}
+        makeSyncRequest={makeSyncRequest}
+        notificationContent={notificationContent}
+        onAudioNotificationsChange={onAudioNotificationsChange}
+        onAutoDownloadUpdateChange={onAutoDownloadUpdateChange}
+        onAutoLaunchChange={onAutoLaunchChange}
+        onCallNotificationsChange={onCallNotificationsChange}
+        onCallRingtoneNotificationChange={onCallRingtoneNotificationChange}
+        onCountMutedConversationsChange={onCountMutedConversationsChange}
+        onHasStoriesDisabledChanged={onHasStoriesDisabledChanged}
+        onHideMenuBarChange={onHideMenuBarChange}
+        onIncomingCallNotificationsChange={onIncomingCallNotificationsChange}
+        onLastSyncTimeChange={onLastSyncTimeChange}
+        onMediaCameraPermissionsChange={onMediaCameraPermissionsChange}
+        onMediaPermissionsChange={onMediaPermissionsChange}
+        onMinimizeToAndStartInSystemTrayChange={
+          onMinimizeToAndStartInSystemTrayChange
+        }
+        onMinimizeToSystemTrayChange={onMinimizeToSystemTrayChange}
+        onNotificationAttentionChange={onNotificationAttentionChange}
+        onNotificationContentChange={onNotificationContentChange}
+        onNotificationsChange={onNotificationsChange}
+        onRelayCallsChange={onRelayCallsChange}
+        onSelectedCameraChange={onSelectedCameraChange}
+        onSelectedMicrophoneChange={onSelectedMicrophoneChange}
+        onSelectedSpeakerChange={onSelectedSpeakerChange}
+        onSentMediaQualityChange={onSentMediaQualityChange}
+        onSpellCheckChange={onSpellCheckChange}
+        onTextFormattingChange={onTextFormattingChange}
+        onThemeChange={onThemeChange}
+        onUniversalExpireTimerChange={onUniversalExpireTimerChange}
+        onWhoCanFindMeChange={onWhoCanFindMeChange}
+        onWhoCanSeeMeChange={onWhoCanSeeMeChange}
+        onZoomFactorChange={onZoomFactorChange}
+        removeCustomColorOnConversations={removeCustomColorOnConversations}
+        removeCustomColor={removeCustomColor}
+        resetAllChatColors={resetAllChatColors}
+        resetDefaultChatColor={resetDefaultChatColor}
+        selectedCamera={selectedCamera}
+        selectedMicrophone={selectedMicrophone}
+        selectedSpeaker={selectedSpeaker}
+        sentMediaQualitySetting={sentMediaQualitySetting}
+        setGlobalDefaultConversationColor={setGlobalDefaultConversationColor}
+        shouldShowStoriesSettings={shouldShowStoriesSettings}
+        themeSetting={themeSetting}
+        universalExpireTimer={universalExpireTimer}
+        whoCanFindMe={whoCanFindMe}
+        whoCanSeeMe={whoCanSeeMe}
+        zoomFactor={zoomFactor}
+      />,
+      document.getElementById('app')
+    );
+  }
+);
--- a/ts/windows/settings/preload.ts
+++ b/ts/windows/settings/preload.ts
@ -1,13 +1,12 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only

-import React from 'react';
-import ReactDOM from 'react-dom';
 import { contextBridge, ipcRenderer } from 'electron';
+import { MinimalSignalContext } from '../minimalContext';

-import { SignalContext } from '../context';
+import type { PropsPreloadType } from '../../components/Preferences';
+import OS from '../../util/os/osPreload';
 import * as Settings from '../../types/Settings';
-import { Preferences } from '../../components/Preferences';
 import {
  SystemTraySetting,
  parseSystemTraySetting,
@ -16,7 +15,6 @@ import {
 import { awaitObject } from '../../util/awaitObject';
 import { DurationInSeconds } from '../../util/durations';
 import { createSetting, createCallback } from '../../util/preload';
-import { startInteractionMode } from '../../services/InteractionMode';

 function doneRendering() {
  ipcRenderer.send('settings-done-rendering');
@ -128,9 +126,18 @@ function getSystemTraySettingValues(systemTraySetting: SystemTraySetting): {
  };
 }

-const renderPreferences = async () => {
-  startInteractionMode();
+let renderInBrowser = (_props: PropsPreloadType): void => {
+  throw new Error('render is not defined');
+};

+function attachRenderCallback<Value>(f: (value: Value) => Promise<Value>) {
+  return async (value: Value) => {
+    await f(value);
+    void renderPreferences();
+  };
+}
+
+async function renderPreferences() {
  const {
    blockedCount,
    deviceName,
@ -222,7 +229,7 @@ const renderPreferences = async () => {
  const { hasMinimizeToAndStartInSystemTray, hasMinimizeToSystemTray } =
    getSystemTraySettingValues(systemTraySetting);

-  const onUniversalExpireTimerChange = reRender(
+  const onUniversalExpireTimerChange = attachRenderCallback(
    settingUniversalExpireTimer.setValue
  );

@ -270,13 +277,13 @@ const renderPreferences = async () => {

    // Actions and other props
    addCustomColor: ipcAddCustomColor,
-    closeSettings: () => SignalContext.executeMenuRole('close'),
+    closeSettings: () => MinimalSignalContext.executeMenuRole('close'),
    doDeleteAllData: () => ipcRenderer.send('delete-all-data'),
    doneRendering,
    editCustomColor: ipcEditCustomColor,
    getConversationsWithCustomColor: ipcGetConversationsWithCustomColor,
    initialSpellCheckSetting:
-      SignalContext.config.appStartInitialSpellcheckSetting,
+      MinimalSignalContext.config.appStartInitialSpellcheckSetting,
    makeSyncRequest: ipcMakeSyncRequest,
    removeCustomColor: ipcRemoveCustomColor,
    removeCustomColorOnConversations: ipcRemoveCustomColorOnConversations,
@ -286,93 +293,121 @@ const renderPreferences = async () => {
    shouldShowStoriesSettings,

    // Limited support features
-    isAudioNotificationsSupported: Settings.isAudioNotificationSupported(),
-    isAutoDownloadUpdatesSupported: Settings.isAutoDownloadUpdatesSupported(),
-    isAutoLaunchSupported: Settings.isAutoLaunchSupported(),
-    isHideMenuBarSupported: Settings.isHideMenuBarSupported(),
-    isNotificationAttentionSupported: Settings.isDrawAttentionSupported(),
+    isAudioNotificationsSupported: Settings.isAudioNotificationSupported(OS),
+    isAutoDownloadUpdatesSupported: Settings.isAutoDownloadUpdatesSupported(OS),
+    isAutoLaunchSupported: Settings.isAutoLaunchSupported(OS),
+    isHideMenuBarSupported: Settings.isHideMenuBarSupported(OS),
+    isNotificationAttentionSupported: Settings.isDrawAttentionSupported(OS),
    isPhoneNumberSharingSupported,
    isSyncSupported: !isSyncNotSupported,
    isSystemTraySupported: Settings.isSystemTraySupported(
-      SignalContext.getVersion()
+      OS,
+      MinimalSignalContext.getVersion()
    ),
    isMinimizeToAndStartInSystemTraySupported:
      Settings.isMinimizeToAndStartInSystemTraySupported(
-        SignalContext.getVersion()
+        OS,
+        MinimalSignalContext.getVersion()
      ),

    // Feature flags
    isFormattingFlagEnabled,

    // Change handlers
-    onAudioNotificationsChange: reRender(settingAudioNotification.setValue),
-    onAutoDownloadUpdateChange: reRender(settingAutoDownloadUpdate.setValue),
-    onAutoLaunchChange: reRender(settingAutoLaunch.setValue),
-    onCallNotificationsChange: reRender(settingCallSystemNotification.setValue),
-    onCallRingtoneNotificationChange: reRender(
+    onAudioNotificationsChange: attachRenderCallback(
+      settingAudioNotification.setValue
+    ),
+    onAutoDownloadUpdateChange: attachRenderCallback(
+      settingAutoDownloadUpdate.setValue
+    ),
+    onAutoLaunchChange: attachRenderCallback(settingAutoLaunch.setValue),
+    onCallNotificationsChange: attachRenderCallback(
+      settingCallSystemNotification.setValue
+    ),
+    onCallRingtoneNotificationChange: attachRenderCallback(
      settingCallRingtoneNotification.setValue
    ),
-    onCountMutedConversationsChange: reRender(
+    onCountMutedConversationsChange: attachRenderCallback(
      settingCountMutedConversations.setValue
    ),
-    onHasStoriesDisabledChanged: reRender(async (value: boolean) => {
-      await settingHasStoriesDisabled.setValue(value);
-      if (!value) {
-        void ipcDeleteAllMyStories();
+    onHasStoriesDisabledChanged: attachRenderCallback(
+      async (value: boolean) => {
+        await settingHasStoriesDisabled.setValue(value);
+        if (!value) {
+          void ipcDeleteAllMyStories();
+        }
+        return value;
      }
-      return value;
-    }),
-    onHideMenuBarChange: reRender(settingHideMenuBar.setValue),
-    onIncomingCallNotificationsChange: reRender(
+    ),
+    onHideMenuBarChange: attachRenderCallback(settingHideMenuBar.setValue),
+    onIncomingCallNotificationsChange: attachRenderCallback(
      settingIncomingCallNotification.setValue
    ),
-    onLastSyncTimeChange: reRender(settingLastSyncTime.setValue),
-    onMediaCameraPermissionsChange: reRender(
+    onLastSyncTimeChange: attachRenderCallback(settingLastSyncTime.setValue),
+    onMediaCameraPermissionsChange: attachRenderCallback(
      settingMediaCameraPermissions.setValue
    ),
-    onMinimizeToAndStartInSystemTrayChange: reRender(async (value: boolean) => {
-      await settingSystemTraySetting.setValue(
-        value
-          ? SystemTraySetting.MinimizeToAndStartInSystemTray
-          : SystemTraySetting.MinimizeToSystemTray
-      );
-      return value;
-    }),
-    onMinimizeToSystemTrayChange: reRender(async (value: boolean) => {
-      await settingSystemTraySetting.setValue(
-        value
-          ? SystemTraySetting.MinimizeToSystemTray
-          : SystemTraySetting.DoNotUseSystemTray
-      );
-      return value;
-    }),
-    onMediaPermissionsChange: reRender(settingMediaPermissions.setValue),
-    onNotificationAttentionChange: reRender(
+    onMinimizeToAndStartInSystemTrayChange: attachRenderCallback(
+      async (value: boolean) => {
+        await settingSystemTraySetting.setValue(
+          value
+            ? SystemTraySetting.MinimizeToAndStartInSystemTray
+            : SystemTraySetting.MinimizeToSystemTray
+        );
+        return value;
+      }
+    ),
+    onMinimizeToSystemTrayChange: attachRenderCallback(
+      async (value: boolean) => {
+        await settingSystemTraySetting.setValue(
+          value
+            ? SystemTraySetting.MinimizeToSystemTray
+            : SystemTraySetting.DoNotUseSystemTray
+        );
+        return value;
+      }
+    ),
+    onMediaPermissionsChange: attachRenderCallback(
+      settingMediaPermissions.setValue
+    ),
+    onNotificationAttentionChange: attachRenderCallback(
      settingNotificationDrawAttention.setValue
    ),
-    onNotificationContentChange: reRender(settingNotificationSetting.setValue),
-    onNotificationsChange: reRender(async (value: boolean) => {
+    onNotificationContentChange: attachRenderCallback(
+      settingNotificationSetting.setValue
+    ),
+    onNotificationsChange: attachRenderCallback(async (value: boolean) => {
      await settingNotificationSetting.setValue(
        value ? DEFAULT_NOTIFICATION_SETTING : 'off'
      );
      return value;
    }),
-    onRelayCallsChange: reRender(settingRelayCalls.setValue),
-    onSelectedCameraChange: reRender(settingVideoInput.setValue),
-    onSelectedMicrophoneChange: reRender(settingAudioInput.setValue),
-    onSelectedSpeakerChange: reRender(settingAudioOutput.setValue),
-    onSentMediaQualityChange: reRender(settingSentMediaQuality.setValue),
-    onSpellCheckChange: reRender(settingSpellCheck.setValue),
-    onTextFormattingChange: reRender(settingTextFormatting.setValue),
-    onThemeChange: reRender(settingTheme.setValue),
+    onRelayCallsChange: attachRenderCallback(settingRelayCalls.setValue),
+    onSelectedCameraChange: attachRenderCallback(settingVideoInput.setValue),
+    onSelectedMicrophoneChange: attachRenderCallback(
+      settingAudioInput.setValue
+    ),
+    onSelectedSpeakerChange: attachRenderCallback(settingAudioOutput.setValue),
+    onSentMediaQualityChange: attachRenderCallback(
+      settingSentMediaQuality.setValue
+    ),
+    onSpellCheckChange: attachRenderCallback(settingSpellCheck.setValue),
+    onTextFormattingChange: attachRenderCallback(
+      settingTextFormatting.setValue
+    ),
+    onThemeChange: attachRenderCallback(settingTheme.setValue),
    onUniversalExpireTimerChange: (newValue: number): Promise<void> => {
      return onUniversalExpireTimerChange(
        DurationInSeconds.fromSeconds(newValue)
      );
    },

-    onWhoCanFindMeChange: reRender(settingPhoneNumberDiscoverability.setValue),
-    onWhoCanSeeMeChange: reRender(settingPhoneNumberSharing.setValue),
+    onWhoCanFindMeChange: attachRenderCallback(
+      settingPhoneNumberDiscoverability.setValue
+    ),
+    onWhoCanSeeMeChange: attachRenderCallback(
+      settingPhoneNumberSharing.setValue
+    ),

    // Zoom factor change doesn't require immediate rerender since it will:
    // 1. Update the zoom factor in the main window
@ -381,28 +416,22 @@ const renderPreferences = async () => {
    //    rerender.
    onZoomFactorChange: settingZoomFactor.setValue,

-    i18n: SignalContext.i18n,
-
-    hasCustomTitleBar: SignalContext.OS.hasCustomTitleBar(),
-    executeMenuRole: SignalContext.executeMenuRole,
+    hasCustomTitleBar: MinimalSignalContext.OS.hasCustomTitleBar(),
+    executeMenuRole: MinimalSignalContext.executeMenuRole,
  };

-  function reRender<Value>(f: (value: Value) => Promise<Value>) {
-    return async (value: Value) => {
-      await f(value);
-      void renderPreferences();
-    };
-  }
-
-  ReactDOM.render(
-    React.createElement(Preferences, props),
-    document.getElementById('app')
-  );
-};
+  renderInBrowser(props);
+}

 ipcRenderer.on('preferences-changed', () => renderPreferences());

-contextBridge.exposeInMainWorld('SignalContext', {
-  ...SignalContext,
-  renderWindow: renderPreferences,
-});
+const Signal = {
+  SettingsWindowProps: {
+    onRender: (renderer: (_props: PropsPreloadType) => void) => {
+      renderInBrowser = renderer;
+      void renderPreferences();
+    },
+  },
+};
+contextBridge.exposeInMainWorld('Signal', Signal);
+contextBridge.exposeInMainWorld('SignalContext', MinimalSignalContext);
--- a/yarn.lock
+++ b/yarn.lock
@ -6182,6 +6182,14 @@ buffer-xor@^1.0.3:
  version "1.0.3"
  resolved "https://registry.yarnpkg.com/buffer-xor/-/buffer-xor-1.0.3.tgz#26e61ed1422fb70dd42e6e36729ed51d855fe8d9"

+buffer@6.0.3, buffer@^6.0.3:
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-6.0.3.tgz#2ace578459cc8fbe2a70aaa8f52ee63b6a74c6c6"
+  integrity sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==
+  dependencies:
+    base64-js "^1.3.1"
+    ieee754 "^1.2.1"
+
 buffer@^4.3.0:
  version "4.9.1"
  resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.1.tgz#6d1bb601b07a4efced97094132093027c95bc298"
@ -6198,14 +6206,6 @@ buffer@^5.5.0:
    base64-js "^1.3.1"
    ieee754 "^1.1.13"

-buffer@^6.0.3:
-  version "6.0.3"
-  resolved "https://registry.yarnpkg.com/buffer/-/buffer-6.0.3.tgz#2ace578459cc8fbe2a70aaa8f52ee63b6a74c6c6"
-  integrity sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==
-  dependencies:
-    base64-js "^1.3.1"
-    ieee754 "^1.2.1"
-
 bufferutil@^4.0.1:
  version "4.0.7"
  resolved "https://registry.yarnpkg.com/bufferutil/-/bufferutil-4.0.7.tgz#60c0d19ba2c992dd8273d3f73772ffc894c153ad"
@ -18385,7 +18385,7 @@ utils-merge@1.0.1:
  resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
  integrity sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==

-uuid-browser@^3.1.0:
+uuid-browser@3.1.0, uuid-browser@^3.1.0:
  version "3.1.0"
  resolved "https://registry.yarnpkg.com/uuid-browser/-/uuid-browser-3.1.0.tgz#0f05a40aef74f9e5951e20efbf44b11871e56410"
  integrity sha1-DwWkCu90+eWVHiDvv0SxGHHlZBA=