diff --git a/chrome/content/zotero-platform/mac/integration.css b/chrome/content/zotero-platform/mac/integration.css
index f33b75ad3a..d3f6ee46fb 100644
--- a/chrome/content/zotero-platform/mac/integration.css
+++ b/chrome/content/zotero-platform/mac/integration.css
@@ -14,6 +14,10 @@ body[multiline="true"] {
 	width: 800px;
 }
 
+#quick-format-dialog.progress-bar #quick-format-deck {
+	height: 37px;
+}
+
 #quick-format-search {
 	background: white;
 	-moz-appearance: searchfield;
diff --git a/chrome/content/zotero/integration/progressBar.js b/chrome/content/zotero/integration/progressBar.js
new file mode 100644
index 0000000000..d669cea467
--- /dev/null
+++ b/chrome/content/zotero/integration/progressBar.js
@@ -0,0 +1,129 @@
+/*
+    ***** BEGIN LICENSE BLOCK *****
+    
+    Copyright © 2018 Center for History and New Media
+				     George Mason University, Fairfax, Virginia, USA
+				     http://zotero.org
+    
+    This file is part of Zotero.
+    
+    Zotero is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+    
+    Zotero is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+    
+    You should have received a copy of the GNU Affero General Public License
+    along with Zotero.  If not, see <http://www.gnu.org/licenses/>.
+    
+    ***** END LICENSE BLOCK *****
+*/
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+var Zotero_ProgressBar = new function () {
+	var initialized, io;
+	
+	/**
+	 * Pre-initialization, when the dialog has loaded but has not yet appeared
+	 */
+	this.onDOMContentLoaded = function(event) {
+		if(event.target === document) {
+			initialized = true;
+			io = window.arguments[0].wrappedJSObject;
+			if (io.onLoad) {
+				io.onLoad(_onProgress);
+			}
+			
+			// Only hide chrome on Windows or Mac
+			if(Zotero.isMac) {
+				document.documentElement.setAttribute("drawintitlebar", true);
+			} else if(Zotero.isWin) {
+				document.documentElement.setAttribute("hidechrome", true);
+			}
+			
+			new WindowDraggingElement(document.getElementById("quick-format-dialog"), window);
+		
+		}
+	};
+	
+	/**
+	 * Initialize add citation dialog
+	 */
+	this.onLoad = function(event) {
+		if(event.target !== document) return;		
+		// make sure we are visible
+		window.setTimeout(function() {
+			// window.resizeTo(window.outerWidth, window.outerHeight);
+			var screenX = window.screenX;
+			var screenY = window.screenY;
+			var xRange = [window.screen.availLeft, window.screen.width-window.outerWidth];
+			var yRange = [window.screen.availTop, window.screen.height-window.outerHeight];
+			if (screenX < xRange[0] || screenX > xRange[1] || screenY < yRange[0] || screenY > yRange[1]) {
+				var targetX = Math.max(Math.min(screenX, xRange[1]), xRange[0]);
+				var targetY = Math.max(Math.min(screenY, yRange[1]), yRange[0]);
+				Zotero.debug("Moving window to "+targetX+", "+targetY);
+				window.moveTo(targetX, targetY);
+			}
+		}, 0);
+
+		window.focus();
+	};
+	
+	/**
+	 * Called when progress changes
+	 */
+	function _onProgress(percent) {
+		var meter = document.getElementById("quick-format-progress-meter");
+		if(percent === null) {
+			meter.mode = "undetermined";
+		} else {
+			meter.mode = "determined";
+			meter.value = Math.round(percent);
+		}
+	}
+	
+	/**
+	 * Resizes windows
+	 * @constructor
+	 */
+	var Resizer = function(panel, targetWidth, targetHeight, pixelsPerStep, stepsPerSecond) {
+		this.panel = panel;
+		this.curWidth = panel.clientWidth;
+		this.curHeight = panel.clientHeight;
+		this.difX = (targetWidth ? targetWidth - this.curWidth : 0);
+		this.difY = (targetHeight ? targetHeight - this.curHeight : 0);
+		this.step = 0;
+		this.steps = Math.ceil(Math.max(Math.abs(this.difX), Math.abs(this.difY))/pixelsPerStep);
+		this.timeout = (1000/stepsPerSecond);
+		
+		var me = this;
+		this._animateCallback = function() { me.animate() };
+	};
+	
+	/**
+	 * Performs a step of the animation
+	 */
+	Resizer.prototype.animate = function() {
+		if(this.stopped) return;
+		this.step++;
+		this.panel.sizeTo(this.curWidth+Math.round(this.step*this.difX/this.steps),
+			this.curHeight+Math.round(this.step*this.difY/this.steps));
+		if(this.step !== this.steps) {
+			window.setTimeout(this._animateCallback, this.timeout);
+		}
+	};
+	
+	/**
+	 * Halts resizing
+	 */
+	Resizer.prototype.stop = function() {
+		this.stopped = true;
+	};
+}
+
+window.addEventListener("DOMContentLoaded", Zotero_ProgressBar.onDOMContentLoaded, false);
+window.addEventListener("load", Zotero_ProgressBar.onLoad, false);
diff --git a/chrome/content/zotero/integration/progressBar.xul b/chrome/content/zotero/integration/progressBar.xul
new file mode 100644
index 0000000000..abbc0ab644
--- /dev/null
+++ b/chrome/content/zotero/integration/progressBar.xul
@@ -0,0 +1,51 @@
+<?xml version="1.0"?>
+<!--
+    ***** BEGIN LICENSE BLOCK *****
+    
+    Copyright © 2018 Center for History and New Media
+                     George Mason University, Fairfax, Virginia, USA
+                     http://zotero.org
+    
+    This file is part of Zotero.
+    
+    Zotero is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+    
+    Zotero is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+    
+    You should have received a copy of the GNU Affero General Public License
+    along with Zotero.  If not, see <http://www.gnu.org/licenses/>.
+    
+    ***** END LICENSE BLOCK *****
+-->
+<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
+<?xml-stylesheet href="chrome://global/skin/browser.css" type="text/css"?>
+<?xml-stylesheet href="chrome://zotero/skin/zotero.css" type="text/css"?>
+<?xml-stylesheet href="chrome://zotero/skin/integration.css" type="text/css"?>
+<?xml-stylesheet href="chrome://zotero-platform/content/integration.css" type="text/css"?>
+<!DOCTYPE window SYSTEM "chrome://zotero/locale/zotero.dtd">
+
+<window
+	id="quick-format-dialog"
+	class="progress-bar"
+	orient="vertical"
+	title="&zotero.progress.title;"
+	xmlns:html="http://www.w3.org/1999/xhtml"
+	xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+	persist="screenX screenY">
+	
+	<script src="../include.js"/>
+	<script src="windowDraggingUtils.js" type="text/javascript"/>
+	<script src="progressBar.js" type="text/javascript"/>
+	
+	<box orient="horizontal" id="quick-format-entry"> 
+		<deck id="quick-format-deck" selectedIndex="0" flex="1">
+			<progressmeter id="quick-format-progress-meter" mode="undetermined" value="0" flex="1"/>
+		</deck>
+	</box>
+</window>
diff --git a/chrome/content/zotero/xpcom/connector/httpIntegrationClient.js b/chrome/content/zotero/xpcom/connector/httpIntegrationClient.js
index 2d0981f708..1e200e1d14 100644
--- a/chrome/content/zotero/xpcom/connector/httpIntegrationClient.js
+++ b/chrome/content/zotero/xpcom/connector/httpIntegrationClient.js
@@ -85,8 +85,7 @@ for (let method of ["activate", "canInsertField", "displayAlert", "getDocumentDa
 
 // @NOTE Currently unused, prompts are done using the connector
 Zotero.HTTPIntegrationClient.Document.prototype._displayAlert = async function(dialogText, icon, buttons) {
-	var ps = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
-		.getService(Components.interfaces.nsIPromptService);
+	var ps = Services.prompt;
 	var buttonFlags = (ps.BUTTON_POS_0) * (ps.BUTTON_TITLE_OK)
 		+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_IS_STRING);
 	
@@ -172,8 +171,7 @@ Zotero.HTTPIntegrationClient.Field.prototype.getText = async function() {
 Zotero.HTTPIntegrationClient.Field.prototype.setText = async function(text, isRich) {
 	// The HTML will be stripped by Google Docs and and since we're 
 	// caching this value, we need to strip it ourselves
-	var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"]
-		.getService(Components.interfaces.nsIWindowMediator);
+	var wm = Services.wm;
 	var win = wm.getMostRecentWindow('navigator:browser');
 	var doc = new win.DOMParser().parseFromString(text, "text/html");
 	this._text = doc.documentElement.textContent;
diff --git a/chrome/content/zotero/xpcom/connector/server_connector.js b/chrome/content/zotero/xpcom/connector/server_connector.js
index 79542465d3..70da872381 100644
--- a/chrome/content/zotero/xpcom/connector/server_connector.js
+++ b/chrome/content/zotero/xpcom/connector/server_connector.js
@@ -484,6 +484,12 @@ Zotero.Server.Connector.SavePage.prototype = {
 	 * @param {Function} sendResponseCallback function to send HTTP response
 	 */
 	init: function(url, data, sendResponseCallback) {
+		var { library, collection, editable } = Zotero.Server.Connector.getSaveTarget();
+		if (!library.editable) {
+			Zotero.logError("Can't add item to read-only library " + library.name);
+			return sendResponseCallback(500, "application/json", JSON.stringify({ libraryEditable: false }));
+		}
+		
 		this.sendResponse = sendResponseCallback;
 		Zotero.Server.Connector.Detect.prototype.init.apply(this, [url, data, sendResponseCallback])
 	},
@@ -533,11 +539,7 @@ Zotero.Server.Connector.SavePage.prototype = {
 		var jsonItems = [];
 		translate.setHandler("select", function(obj, item, callback) { return me._selectItems(obj, item, callback) });
 		translate.setHandler("itemDone", function(obj, item, jsonItem) {
-			if(collection) {
-				collection.addItem(item.id);
-			}
 			Zotero.Server.Connector.AttachmentProgressManager.add(jsonItem.attachments);
-			
 			jsonItems.push(jsonItem);
 		});
 		translate.setHandler("attachmentProgress", function(obj, attachment, progress, error) {
@@ -557,7 +559,7 @@ Zotero.Server.Connector.SavePage.prototype = {
 		} else {
 			translate.setTranslator(translators[0]);
 		}
-		translate.translate(libraryID);
+		translate.translate({libraryID, collections: collection ? [collection.id] : false});
 	}
 }
 
diff --git a/chrome/content/zotero/xpcom/integration.js b/chrome/content/zotero/xpcom/integration.js
index 26d9192e0a..909c0b9207 100644
--- a/chrome/content/zotero/xpcom/integration.js
+++ b/chrome/content/zotero/xpcom/integration.js
@@ -317,6 +317,18 @@ Zotero.Integration = new function() {
 					oldWindow.close();
 				});
 			}
+
+			if (Zotero.Integration.currentSession && Zotero.Integration.currentSession.progressBar) {
+				Zotero.Promise.delay(5).then(function() {
+					Zotero.Integration.currentSession.progressBar.hide();
+				});
+			}
+			// This technically shouldn't be necessary since we call document.activate(),
+			// but http integration plugins may not have OS level access to windows to be
+			// able to activate themselves. E.g. Google Docs on Safari.
+			if (Zotero.isMac && agent == 'http') {
+				Zotero.Utilities.Internal.sendToBack();
+			}
 			
 			Zotero.Integration.currentDoc = Zotero.Integration.currentWindow = false;
 		}
@@ -330,7 +342,9 @@ Zotero.Integration = new function() {
 	 * @return {Promise} Promise resolved when the window is closed
 	 */
 	this.displayDialog = async function displayDialog(url, options, io) {
+		Zotero.debug(`Integration: Displaying dialog ${url}`);
 		await Zotero.Integration.currentDoc.cleanup();
+		Zotero.Integration.currentSession && await Zotero.Integration.currentSession.progressBar.hide(true);
 		
 		var allOptions = 'chrome,centerscreen';
 		// without this, Firefox gets raised with our windows under Compiz
@@ -358,8 +372,14 @@ Zotero.Integration = new function() {
 			deferred.resolve();
 		}
 		window.addEventListener("unload", listener, false);
-		
+
 		await deferred.promise;
+		// We do not want to redisplay the progress bar if this window close
+		// was the final close of the integration command
+		await Zotero.Promise.delay(10);
+		if (Zotero.Integration.currentDoc) {
+			Zotero.Integration.currentSession.progressBar.show();
+		}
 	};
 	
 	/**
@@ -368,6 +388,9 @@ Zotero.Integration = new function() {
 	 * @return {Zotero.Integration.Session} Promise
 	 */
 	this.getSession = async function (app, doc, agent) {
+		var progressBar = new Zotero.Integration.Progress(4, Zotero.isMac && agent != 'http');
+		progressBar.show();
+		
 		var dataString = await doc.getDocumentData(),
 			data, session;
 		
@@ -439,7 +462,6 @@ Zotero.Integration = new function() {
 						if (installed) {
 							await session.setData(data, true);
 						}
-						return session;
 					}
 				}
 				await session.setDocPrefs();
@@ -449,6 +471,11 @@ Zotero.Integration = new function() {
 		}
 		session.agent = agent;
 		session._doc = doc;
+		if (session.progressBar) {
+			progressBar.reset();
+			progressBar.segments = session.progressBar.segments;
+		}
+		session.progressBar = progressBar;
 		return session;
 	};
 	
@@ -807,14 +834,16 @@ Zotero.Integration.Fields.prototype.get = new function() {
 		var promise = deferred.promise;
 		
 		// Otherwise, start getting fields
-		var getFieldsTime = (new Date()).getTime();
+		var timer = new Zotero.Integration.Timer();
+		timer.start();
+		this._session.progressBar.start();
 		try {
 			var fields = this._fields = Array.from(await this._doc.getFields(this._session.data.prefs['fieldType']));
-						
-			var endTime = (new Date()).getTime();
-			Zotero.debug("Integration: Retrieved "+fields.length+" fields in "+
-				(endTime-getFieldsTime)/1000+"; "+
-				1000/((endTime-getFieldsTime)/fields.length)+" fields/second");
+			
+			var retrieveTime = timer.stop();
+			this._session.progressBar.finishSegment();
+			Zotero.debug("Integration: Retrieved " + fields.length + " fields in " +
+				retrieveTime + "; " + fields.length/retrieveTime + " fields/second");
 			deferred.resolve(fields);
 		} catch(e) {
 			deferred.reject(e);
@@ -829,7 +858,6 @@ Zotero.Integration.Fields.prototype.get = new function() {
  * Updates Zotero.Integration.Session attached to Zotero.Integration.Fields in line with document
  */
 Zotero.Integration.Fields.prototype.updateSession = Zotero.Promise.coroutine(function* (forceCitations) {
-	var collectFieldsTime;
 	yield this.get();
 	this._session.resetRequest(this._doc);
 	
@@ -837,19 +865,19 @@ Zotero.Integration.Fields.prototype.updateSession = Zotero.Promise.coroutine(fun
 	this._deleteFields = {};
 	this._bibliographyFields = [];
 	
-	collectFieldsTime = (new Date()).getTime();
+	var timer = new Zotero.Integration.Timer();
+	timer.start();
+	this._session.progressBar.start();
 	if (forceCitations) {
 		this._session.regenAll = true;
 	}
 	yield this._processFields();
 	this._session.regenAll = false;
-	
-	var endTime = (new Date()).getTime();
-	if(Zotero.Debug.enabled) {
-		Zotero.debug("Integration: Updated session data for " + this._fields.length + " fields in "
-			+ (endTime - collectFieldsTime) / 1000 + "; "
-			+ 1000/ ((endTime - collectFieldsTime) / this._fields.length) + " fields/second");
-	}
+
+	var updateTime = timer.stop();
+	this._session.progressBar.finishSegment();
+	Zotero.debug("Integration: Updated session data for " + this._fields.length + " fields in "
+		+ updateTime + "; " + this._fields.length/updateTime + " fields/second");
 	
 	if (this._session.reload) {
 		this._session.restoreProcessorState();
@@ -905,8 +933,12 @@ Zotero.Integration.Fields.prototype.updateDocument = Zotero.Promise.coroutine(fu
 	this._session.timer = new Zotero.Integration.Timer();
 	this._session.timer.start();
 	
+	this._session.progressBar.start();
 	yield this._session._updateCitations()
+	this._session.progressBar.finishSegment();
+	this._session.progressBar.start();
 	yield this._updateDocument(forceCitations, forceBibliography, ignoreCitationChanges)
+	this._session.progressBar.finishSegment();
 
 	var diff = this._session.timer.stop();
 	this._session.timer = null;
@@ -1172,7 +1204,6 @@ Zotero.Integration.Fields.prototype.addEditCitation = async function (field) {
 		fieldIndexPromise, citationsByItemIDPromise, previewFn
 	);
 	
-	Zotero.debug('Integration: Displaying citation dialogue');
 	if (Zotero.Prefs.get("integration.useClassicAddCitationDialog")) {
 		Zotero.Integration.displayDialog('chrome://zotero/content/integration/addCitationDialog.xul',
 			'alwaysRaised,resizable', io);
@@ -2687,21 +2718,101 @@ Zotero.Integration.Timer = class {
 	
 	stop() {
 		this.resume();
-		return ((new Date()).getTime() - this.startTime)/1000;
+		this.finalTime = ((new Date()).getTime() - this.startTime)
+		return this.finalTime/1000;
 	}
 	
 	pause() {
 		this.pauseTime = (new Date()).getTime();
 	}
 	
+	getSplit() {
+		var pauseTime = 0;
+		if (this.pauseTime) {
+			var pauseTime = (new Date()).getTime() - this.pauseTime;
+		}
+		return ((new Date()).getTime() - this.startTime - pauseTime);
+	}
+	
 	resume() {
 		if (this.pauseTime) {
 			this.startTime += ((new Date()).getTime() - this.pauseTime);
-			this.pauseTime = null;
+			this.pauseTime;
 		}
 	}
 }
 
+Zotero.Integration.Progress = class {
+	/**
+	 * @param {Number} segmentCount
+	 * @param {Boolean} dontDisplay
+	 *		On macOS closing an application window switches focus to the topmost window of the same application
+	 *		instead of the previous window of any application. Since the progress window is opened and closed
+	 *		between showing other integration windows, macOS will switch focus to the main Zotero window (and
+	 *		move the word processor window to the background). Thus we avoid showing the progress window on macOS
+	 *		except for http agents (i.e. google docs), where even opening the citation dialog may potentially take
+	 *		a long time and having no indication of progress is worse than bringing the Zotero window to the front
+	 */
+	constructor(segmentCount=4, dontDisplay=false) {
+		this.segments = Array.from({length: segmentCount}, () => undefined);
+		this.timer = new Zotero.Integration.Timer();
+		this.segmentIdx = 0;
+		this.dontDisplay = dontDisplay;
+	}
+	
+	update() {
+		if (!this.onProgress) return;
+		var currentSegment = this.segments[this.segmentIdx];
+		if (!currentSegment) return;
+		var total = this.segments.reduce((acc, val) => acc+val, 0);
+		var startProgress = 100*this.segments.slice(0, this.segmentIdx).reduce((acc, val) => acc+val, 0)/total;
+		var maxProgress = 100.0*currentSegment/total;
+		var split = this.timer.getSplit();
+		var curProgress = startProgress + maxProgress*Math.min(1, split/currentSegment);
+		this.onProgress(curProgress);
+		setTimeout(this.update.bind(this), 100);
+	}
+	
+	start() {
+		this.timer.start();
+	}
+	pause() {this.timer.pause();}
+	resume() {this.timer.resume();}
+	finishSegment() {
+		this.timer.stop();
+		this.segments[this.segmentIdx++] = this.timer.finalTime;
+	}
+	reset() {
+		this.segmentIdx = 0;
+	}
+	show() {
+		if (this.dontDisplay) return;
+		var options = 'chrome,centerscreen';
+		// without this, Firefox gets raised with our windows under Compiz
+		if (Zotero.isLinux) options += ',dialog=no';
+		if (Zotero.isMac) options += ',resizable=false';
+		
+		var io = {onLoad: function(onProgress) {
+			this.onProgress = onProgress;
+			this.update();
+		}.bind(this)};
+		io.wrappedJSObject = io;
+		this.window = Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
+			.getService(Components.interfaces.nsIWindowWatcher)
+			.openWindow(null, 'chrome://zotero/content/integration/progressBar.xul', '', options, io);
+		Zotero.Utilities.Internal.activate(this.window);
+	}
+	async hide(fast=false) {
+		if (this.dontDisplay || !this.window) return;
+		if (!fast) {
+			this.onProgress && this.onProgress(100);
+			this.onProgress = null;
+			await Zotero.Promise.delay(300);
+		}
+		this.window.close();
+	}
+}
+
 Zotero.Integration.LegacyPluginWrapper = function(application) {
 	function wrapField(field) {
 		var wrapped = {rawField: field};
diff --git a/chrome/content/zotero/xpcom/utilities_internal.js b/chrome/content/zotero/xpcom/utilities_internal.js
index 305344870e..bd86815592 100644
--- a/chrome/content/zotero/xpcom/utilities_internal.js
+++ b/chrome/content/zotero/xpcom/utilities_internal.js
@@ -1660,6 +1660,18 @@ Zotero.Utilities.Internal.activate = new function() {
 	}
 };
 
+Zotero.Utilities.Internal.sendToBack = function() {
+	if (Zotero.isMac) {
+		Zotero.Utilities.Internal.executeAppleScript(`
+			tell application "System Events"
+				if frontmost of application id "org.zotero.zotero" then
+					set visible of process "Zotero" to false
+				end if
+			end tell
+		`);
+	}
+}
+
 /**
  *  Base64 encode / decode
  *  From http://www.webtoolkit.info/
diff --git a/test/tests/integrationTest.js b/test/tests/integrationTest.js
index c1a0ff88fb..681f37f629 100644
--- a/test/tests/integrationTest.js
+++ b/test/tests/integrationTest.js
@@ -305,9 +305,12 @@ describe("Zotero.Integration", function () {
 		});
 		
 		addEditCitationSpy = sinon.spy(Zotero.Integration.Interface.prototype, 'addEditCitation');
+		
+		sinon.stub(Zotero.Integration.Progress.prototype, 'show');
 	});
 	
 	after(function() {
+		Zotero.Integration.Progress.prototype.show.restore();
 		Zotero.Integration.getApplication.restore();
 		displayDialogStub.restore();
 		addEditCitationSpy.restore();