diff --git a/chrome/content/zotero/tools/testTranslators/testTranslators.js b/chrome/content/zotero/tools/testTranslators/testTranslators.js
index bd170febe..f91b8de6f 100644
--- a/chrome/content/zotero/tools/testTranslators/testTranslators.js
+++ b/chrome/content/zotero/tools/testTranslators/testTranslators.js
@@ -24,8 +24,9 @@
 */
 
 const NUM_CONCURRENT_TESTS = 6;
-const TRANSLATOR_TYPES = ["Web", "Import", "Export", "Search"];
 const TABLE_COLUMNS = ["Translator", "Supported", "Status", "Pending", "Succeeded", "Failed", "Mismatch", "Issues"];
+// Not using const to prevent const collisions in connectors
+var TRANSLATOR_TYPES = ["Web", "Import", "Export", "Search"];
 var translatorTables = {},
 	translatorTestViews = {},
 	translatorTestViewsToRun = {},
diff --git a/chrome/content/zotero/tools/testTranslators/translatorTester.js b/chrome/content/zotero/tools/testTranslators/translatorTester.js
index cbeab693d..298f16815 100644
--- a/chrome/content/zotero/tools/testTranslators/translatorTester.js
+++ b/chrome/content/zotero/tools/testTranslators/translatorTester.js
@@ -36,7 +36,7 @@ try {
 	var Zotero;
 }
 
-Zotero_TranslatorTesters = new function() {
+var Zotero_TranslatorTesters = new function() {
 	const TEST_TYPES = ["web", "import", "export", "search"];
 	var collectedResults = {};
 	
@@ -190,7 +190,7 @@ Zotero_TranslatorTesters = new function() {
  * @param {Function} [debugCallback] A function to call to write debug output. If not present,
  *     Zotero.debug will be used.
  */
-Zotero_TranslatorTester = function(translator, type, debugCallback) {
+var Zotero_TranslatorTester = function(translator, type, debugCallback) {
 	this.type = type;
 	this.translator = translator;
 	this.output = "";
diff --git a/chrome/content/zotero/xpcom/connector/repo.js b/chrome/content/zotero/xpcom/connector/repo.js
index b747f6d1e..1b5080fdd 100644
--- a/chrome/content/zotero/xpcom/connector/repo.js
+++ b/chrome/content/zotero/xpcom/connector/repo.js
@@ -56,7 +56,7 @@ Zotero.Repo = new function() {
 	 * Get translator code from repository
 	 * @param {String} translatorID ID of the translator to retrieve code for
 	 */
-	this.getTranslatorCode = Zotero.Promise.method(function (translatorID) {
+	this.getTranslatorCode = Zotero.Promise.method(function (translatorID, debugMode) {
 		var deferred = Zotero.Promise.defer();
 		
 		// try standalone
@@ -72,6 +72,11 @@ Zotero.Repo = new function() {
 				);
 				return;
 			}
+			// Don't fetch from repo in debug mode
+			if (debugMode) {
+				deferred.resolve([false, Zotero.Repo.SOURCE_ZOTERO_STANDALONE]);
+				return;
+			}
 			
 			
 			// then try repo
diff --git a/chrome/content/zotero/xpcom/connector/translator.js b/chrome/content/zotero/xpcom/connector/translator.js
index 3cf970b04..467f1dc50 100644
--- a/chrome/content/zotero/xpcom/connector/translator.js
+++ b/chrome/content/zotero/xpcom/connector/translator.js
@@ -130,7 +130,9 @@ Zotero.Translators = new function() {
 		if(!_initialized) Zotero.Translators.init()
 		var translators = _cache[type].slice(0);
 		var codeGetter = new Zotero.Translators.CodeGetter(translators, debugMode);
-		return codeGetter.getAll();
+		return codeGetter.getAll().then(function() {
+			return translators;
+		});;
 	});
 	
 	/**
@@ -326,24 +328,36 @@ Zotero.Translators = new function() {
 Zotero.Translators.CodeGetter = function(translators, debugMode) {
 	this._translators = translators;
 	this._debugMode = debugMode;
-}
+	this._concurrency = 1;
+};
 
-Zotero.Translators.CodeGetter.prototype.getAll = Zotero.Promise.method(function () {
-	var translators = [];
-	for (let translator of this._translators) {
-		// retrieve code if no code and translator is supported locally
-		if((translator.runMode === Zotero.Translator.RUN_MODE_IN_BROWSER && !translator.hasOwnProperty("code"))
-				// or if debug mode is enabled (even if unsupported locally)
-				|| (this._debugMode && (!translator.hasOwnProperty("code")
-				// or if in debug mode and the code we have came from the repo (which doesn't
-				// include test cases)
-				|| (Zotero.Repo && translator.codeSource === Zotero.Repo.SOURCE_REPO)))) {
-				// get next translator
-			translators.push(translator.getCode());
+Zotero.Translators.CodeGetter.prototype.getCodeFor = Zotero.Promise.method(function(i) {
+	let translator = this._translators[i];
+	// retrieve code if no code and translator is supported locally
+	if((translator.runMode === Zotero.Translator.RUN_MODE_IN_BROWSER && !translator.hasOwnProperty("code"))
+			// or if debug mode is enabled (even if unsupported locally)
+			|| (this._debugMode && (!translator.hasOwnProperty("code")
+			// or if in debug mode and the code we have came from the repo (which doesn't
+			// include test cases)
+			|| (Zotero.Repo && translator.codeSource === Zotero.Repo.SOURCE_REPO)))) {
+		// get code
+		return translator.getCode();
+	}
+});
+
+Zotero.Translators.CodeGetter.prototype.getAll = function () {
+	var codes = [];
+	// Chain promises with some level of concurrency. If unchained, fires 
+	// off hundreds of xhttprequests on connectors and crashes the extension
+	for (let i = 0; i < this._translators.length; i++) {
+		if (i < this._concurrency) {
+			codes.push(this.getCodeFor(i));
+		} else {
+			codes.push(codes[i-this._concurrency].then(() => this.getCodeFor(i)));
 		}
 	}
-	return Zotero.Promise.all(translators);
-});
+	return Promise.all(codes);
+};
 
 var TRANSLATOR_REQUIRED_PROPERTIES = ["translatorID", "translatorType", "label", "creator", "target",
 		"priority", "lastUpdated"];
@@ -428,8 +442,8 @@ Zotero.Translator.prototype.init = function(info) {
  *
  * @return {Promise<String|false>} - Promise for translator code or false if none
  */
-Zotero.Translator.prototype.getCode = function () {
-	return Zotero.Repo.getTranslatorCode(this.translatorID)
+Zotero.Translator.prototype.getCode = function (debugMode) {
+	return Zotero.Repo.getTranslatorCode(this.translatorID, debugMode)
 	.then(function (args) {
 		var code = args[0];
 		var source = args[1];
diff --git a/chrome/content/zotero/xpcom/server_connector.js b/chrome/content/zotero/xpcom/server_connector.js
index bb6a33799..a7f0ac050 100644
--- a/chrome/content/zotero/xpcom/server_connector.js
+++ b/chrome/content/zotero/xpcom/server_connector.js
@@ -618,7 +618,9 @@ Zotero.Server.Connector.GetTranslatorCode.prototype = {
 	 */
 	"init":function(postData, sendResponseCallback) {
 		var translator = Zotero.Translators.get(postData.translatorID);
-		sendResponseCallback(200, "application/javascript", translator.code);
+		translator.getCode().then(function(code) {
+			sendResponseCallback(200, "application/javascript", code);
+		});
 	}
 }
 
diff --git a/chrome/content/zotero/xpcom/translation/translate.js b/chrome/content/zotero/xpcom/translation/translate.js
index b6b855076..4b8e11fbe 100644
--- a/chrome/content/zotero/xpcom/translation/translate.js
+++ b/chrome/content/zotero/xpcom/translation/translate.js
@@ -1264,7 +1264,7 @@ Zotero.Translate.Base.prototype = {
 		
 		// Zotero.Translators.get() returns a promise in the connectors, but we don't expect it to
 		// otherwise
-		if (!this.isConnector && this.translator[0].then) {
+		if (!Zotero.isConnector && this.translator[0].then) {
 			throw new Error("Translator should not be a promise in non-connector mode");
 		}
 		
@@ -1741,9 +1741,12 @@ Zotero.Translate.Base.prototype = {
 			this._sandboxManager = new Zotero.Translate.SandboxManager(this._sandboxLocation);
 		}
 		const createArrays = "['creators', 'notes', 'tags', 'seeAlso', 'attachments']";
-		var src = "var Zotero = {};"+
-		"Zotero.Item = function (itemType) {"+
-				"const createArrays = "+createArrays+";"+
+		var src = "";
+		if (Zotero.isFx && !Zotero.isBookmarklet) {
+			src = "var Zotero = {};";
+		}
+		src += "Zotero.Item = function (itemType) {"+
+				"var createArrays = "+createArrays+";"+
 				"this.itemType = itemType;"+
 				"for(var i=0, n=createArrays.length; i<n; i++) {"+
 					"this[createArrays[i]] = [];"+
diff --git a/chrome/content/zotero/xpcom/translation/translators.js b/chrome/content/zotero/xpcom/translation/translators.js
index 9257f35b6..04c94c9d2 100644
--- a/chrome/content/zotero/xpcom/translation/translators.js
+++ b/chrome/content/zotero/xpcom/translation/translators.js
@@ -26,7 +26,7 @@
 "use strict";
 
 // Enumeration of types of translators
-const TRANSLATOR_TYPES = {"import":1, "export":2, "web":4, "search":8};
+var TRANSLATOR_TYPES = {"import":1, "export":2, "web":4, "search":8};
 
 /**
  * Singleton to handle loading and caching of translators
diff --git a/test/content/support.js b/test/content/support.js
index f9c4bdc83..5ecf1ff74 100644
--- a/test/content/support.js
+++ b/test/content/support.js
@@ -753,6 +753,28 @@ var generateTranslatorExportData = Zotero.Promise.coroutine(function* generateTr
 	return translatorExportData;
 });
 
+
+/**
+ * Build a dummy translator that can be passed to Zotero.Translate
+ */
+function buildDummyTranslator(translatorType, code) {
+	let info = {
+		"translatorID":"dummy-translator",
+		"translatorType":1, // import
+		"label":"Dummy Translator",
+		"creator":"Simon Kornblith",
+		"target":"",
+		"priority":100,
+		"browserSupport":"g",
+		"inRepository":false,
+		"lastUpdated":"0000-00-00 00:00:00",
+	};
+	let translator = new Zotero.Translator(info);
+	translator.code = code;
+	return translator;
+}
+
+
 /**
  * Imports an attachment from a test file.
  * @param {string} filename - The filename to import (in data directory)
diff --git a/test/tests/server_connectorTest.js b/test/tests/server_connectorTest.js
index 4a7a572fe..73e6b6861 100644
--- a/test/tests/server_connectorTest.js
+++ b/test/tests/server_connectorTest.js
@@ -33,6 +33,34 @@ describe("Connector Server", function () {
 	after(function () {
 		win.close();
 	});
+
+
+	describe('/connector/getTranslatorCode', function() {
+		it('should respond with translator code', function* () {
+			var code = 'function detectWeb() {}\nfunction doImport() {}';
+			var translator = buildDummyTranslator(4, code);
+			sinon.stub(Zotero.Translators, 'get').returns(translator);
+
+			var response = yield Zotero.HTTP.request(
+				'POST',
+				connectorServerPath + "/connector/getTranslatorCode",
+				{
+					headers: {
+						"Content-Type": "application/json"
+					},
+					body: JSON.stringify({
+						translatorID: "dummy-translator",
+					})
+				}
+			);
+
+			assert.isTrue(Zotero.Translators.get.calledWith('dummy-translator'));
+			assert.equal(response.response, code);
+
+			Zotero.Translators.get.restore();
+		})
+	});
+	
 	
 	describe("/connector/saveItems", function () {
 		// TODO: Test cookies
diff --git a/test/tests/translateTest.js b/test/tests/translateTest.js
index 8fee520ff..74ac32433 100644
--- a/test/tests/translateTest.js
+++ b/test/tests/translateTest.js
@@ -1,26 +1,6 @@
 new function() {
 Components.utils.import("resource://gre/modules/osfile.jsm");
 
-/**
- * Build a dummy translator that can be passed to Zotero.Translate
- */
-function buildDummyTranslator(translatorType, code) {
-	let info = {
-		"translatorID":"dummy-translator",
-		"translatorType":1, // import
-		"label":"Dummy Translator",
-		"creator":"Simon Kornblith",
-		"target":"",
-		"priority":100,
-		"browserSupport":"g",
-		"inRepository":false,
-		"lastUpdated":"0000-00-00 00:00:00",
-	};
-	let translator = new Zotero.Translator(info);
-	translator.code = code;
-	return translator;
-}
-
 /**
  * Create a new translator that saves the specified items
  * @param {String} translatorType - "import" or "web"