diff --git a/chrome/content/zotero/tools/testTranslators/translatorTester.js b/chrome/content/zotero/tools/testTranslators/translatorTester.js
index 64f712e73..db5188bf3 100644
--- a/chrome/content/zotero/tools/testTranslators/translatorTester.js
+++ b/chrome/content/zotero/tools/testTranslators/translatorTester.js
@@ -159,20 +159,26 @@ Zotero_TranslatorTester.prototype._runTestsRecursively = function(testDoneCallba
 
 /**
  * Fetches the page for a given test and runs it
+ * This function is only applicable in Firefox; it is overridden in translator_global.js in Chrome
+ * and Safari
  * @param {Object} test Test to execute
  * @param {Document} doc DOM document to test against
  * @param {Function} testDoneCallback A callback to be executed when test is complete
  */
 Zotero_TranslatorTester.prototype.fetchPageAndRunTest = function(test, testDoneCallback) {
 	var me = this;
-	Zotero.HTTP.processDocuments(test.url,
+	var hiddenBrowser = Zotero.HTTP.processDocuments(test.url,
 		function(doc) {
-			me.runTest(test, doc, testDoneCallback);
+			me.runTest(test, doc, function(obj, test, status, message) {
+				Zotero.Browser.deleteHiddenBrowser(hiddenBrowser);
+				testDoneCallback(obj, test, status, message);
+			});
 		},
 		null,
 		function(e) {
 			testDoneCallback(this, test, "failed", "Translation failed to initialize: "+e);
-		}
+		},
+		true
 	);
 };
 
diff --git a/chrome/content/zotero/xpcom/http.js b/chrome/content/zotero/xpcom/http.js
index 18b49990b..a420d133b 100644
--- a/chrome/content/zotero/xpcom/http.js
+++ b/chrome/content/zotero/xpcom/http.js
@@ -504,14 +504,17 @@ Zotero.HTTP = new function() {
 	 * @param {Function} processor Callback to be executed for each document loaded
 	 * @param {Function} done Callback to be executed after all documents have been loaded
 	 * @param {Function} exception Callback to be executed if an exception occurs
+	 * @param {Boolean} dontDelete Don't delete the hidden browser upon completion; calling function
+	 *                             must call deleteHiddenBrowser itself.
+	 * @return {browser} Hidden browser used for loading
 	 */
-	this.processDocuments = function(urls, processor, done, exception) {
+	this.processDocuments = function(urls, processor, done, exception, dontDelete) {
 		/**
 		 * Removes event listener for the load event and deletes the hidden browser
 		 */
 		var removeListeners = function() {
 			hiddenBrowser.removeEventListener(loadEvent, onLoad, true);
-			Zotero.Browser.deleteHiddenBrowser(hiddenBrowser);
+			if(!dontDelete) Zotero.Browser.deleteHiddenBrowser(hiddenBrowser);
 		}
 		
 		/**
@@ -572,6 +575,8 @@ Zotero.HTTP = new function() {
 		hiddenBrowser.addEventListener(loadEvent, onLoad, true);
 		
 		doLoad();
+		
+		return hiddenBrowser;
 	}
 	
 	/**