176 lines
5.6 KiB
Markdown
176 lines
5.6 KiB
Markdown
# Chrome Extension Support
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Electron supports a subset of the [Chrome Extensions
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API][chrome-extensions-api-index], primarily to support DevTools extensions and
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Chromium-internal extensions, but it also happens to support some other
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extension capabilities.
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[chrome-extensions-api-index]: https://developer.chrome.com/extensions/api_index
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> **Note:** Electron does not support arbitrary Chrome extensions from the
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> store, and it is a **non-goal** of the Electron project to be perfectly
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> compatible with Chrome's implementation of Extensions.
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## Loading extensions
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Electron only supports loading unpacked extensions (i.e., `.crx` files do not
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work). Extensions are installed per-`session`. To load an extension, call
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[`ses.loadExtension`](session.md#sesloadextensionpath-options):
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```js
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const { session } = require('electron')
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session.defaultSession.loadExtension('path/to/unpacked/extension').then(({ id }) => {
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// ...
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})
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```
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Loaded extensions will not be automatically remembered across exits; if you do
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not call `loadExtension` when the app runs, the extension will not be loaded.
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Note that loading extensions is only supported in persistent sessions.
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Attempting to load an extension into an in-memory session will throw an error.
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See the [`session`](session.md) documentation for more information about
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loading, unloading, and querying active extensions.
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## Supported Extensions APIs
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We support the following extensions APIs, with some caveats. Other APIs may
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additionally be supported, but support for any APIs not listed here is
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provisional and may be removed.
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### Supported Manifest Keys
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- `name`
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- `version`
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- `author`
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- `permissions`
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- `content_scripts`
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- `default_locale`
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- `devtools_page`
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- `short_name`
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- `host_permissions` (Manifest V3)
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- `manifest_version`
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- `background` (Manifest V2)
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- `minimum_chrome_version`
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See [Manifest file format](https://developer.chrome.com/docs/extensions/mv3/manifest/) for more information about the purpose of each possible key.
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### `chrome.devtools.inspectedWindow`
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All features of this API are supported.
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/devtools_inspectedWindow) for more information.
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### `chrome.devtools.network`
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All features of this API are supported.
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/devtools_network) for more information.
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### `chrome.devtools.panels`
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All features of this API are supported.
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/devtools_panels) for more information.
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### `chrome.extension`
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The following properties of `chrome.extension` are supported:
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- `chrome.extension.lastError`
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The following methods of `chrome.extension` are supported:
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- `chrome.extension.getURL`
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- `chrome.extension.getBackgroundPage`
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/extension) for more information.
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### `chrome.management`
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The following methods of `chrome.management` are supported:
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- `chrome.management.getAll`
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- `chrome.management.get`
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- `chrome.management.getSelf`
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- `chrome.management.getPermissionWarningsById`
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- `chrome.management.getPermissionWarningsByManifest`
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The following events of `chrome.management` are supported:
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- `chrome.management.onEnabled`
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- `chrome.management.onDisabled`
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/management) for more information.
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### `chrome.runtime`
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The following properties of `chrome.runtime` are supported:
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- `chrome.runtime.lastError`
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- `chrome.runtime.id`
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The following methods of `chrome.runtime` are supported:
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- `chrome.runtime.getBackgroundPage`
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- `chrome.runtime.getManifest`
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- `chrome.runtime.getPlatformInfo`
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- `chrome.runtime.getURL`
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- `chrome.runtime.connect`
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- `chrome.runtime.sendMessage`
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- `chrome.runtime.reload`
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The following events of `chrome.runtime` are supported:
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- `chrome.runtime.onStartup`
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- `chrome.runtime.onInstalled`
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- `chrome.runtime.onSuspend`
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- `chrome.runtime.onSuspendCanceled`
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- `chrome.runtime.onConnect`
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- `chrome.runtime.onMessage`
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/runtime) for more information.
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### `chrome.scripting`
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All features of this API are supported.
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/scripting) for more information.
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### `chrome.storage`
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The following methods of `chrome.storage` are supported:
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- `chrome.storage.local`
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`chrome.storage.sync` and `chrome.storage.managed` are **not** supported.
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/storage) for more information.
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### `chrome.tabs`
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The following methods of `chrome.tabs` are supported:
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- `chrome.tabs.sendMessage`
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- `chrome.tabs.reload`
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- `chrome.tabs.executeScript`
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- `chrome.tabs.query` (partial support)
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- supported properties: `url`, `title`, `audible`, `active`, `muted`.
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- `chrome.tabs.update` (partial support)
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- supported properties: `url`, `muted`.
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> **Note:** In Chrome, passing `-1` as a tab ID signifies the "currently active
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> tab". Since Electron has no such concept, passing `-1` as a tab ID is not
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> supported and will raise an error.
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/tabs) for more information.
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### `chrome.webRequest`
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All features of this API are supported.
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> **NOTE:** Electron's [`webRequest`](web-request.md) module takes precedence over `chrome.webRequest` if there are conflicting handlers.
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See [official documentation](https://developer.chrome.com/docs/extensions/reference/webRequest) for more information.
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