diff --git a/chrome/content/zotero/xpcom/translation/translate.js b/chrome/content/zotero/xpcom/translation/translate.js
index 332a8d037..923334b36 100644
--- a/chrome/content/zotero/xpcom/translation/translate.js
+++ b/chrome/content/zotero/xpcom/translation/translate.js
@@ -777,6 +777,16 @@ Zotero.Translate.Base.prototype = {
 	"clearHandlers":function(type) {
 		this._handlers[type] = new Array();
 	},
+
+	/**
+	 * Clears a single handler for a given function
+	 * @param {String} type See {@link Zotero.Translate.Base#setHandler} for valid values
+	 * @param {Function} handler Callback function to remove
+	 */
+	"removeHandler":function(type, handler) {
+		var handlerIndex = this._handlers[type].indexOf(handler);
+		if(handlerIndex !== -1) this._handlers[type].splice(handlerIndex, 1);
+	},
 	
 	/**
 	 * Indicates that a new async process is running
diff --git a/chrome/content/zotero/xpcom/utilities_translate.js b/chrome/content/zotero/xpcom/utilities_translate.js
index 77f75581c..4d8e1d35e 100644
--- a/chrome/content/zotero/xpcom/utilities_translate.js
+++ b/chrome/content/zotero/xpcom/utilities_translate.js
@@ -230,11 +230,13 @@ Zotero.Utilities.Translate.prototype.processDocuments = function(urls, processor
 	translate.incrementAsyncProcesses("Zotero.Utilities.Translate#processDocuments");
 	var hiddenBrowser = Zotero.HTTP.processDocuments(urls, processor, function() {
 		if(done) done();
-		translate.setHandler("done", function() {
+		var handler = function() {
 			try {
 				Zotero.Browser.deleteHiddenBrowser(hiddenBrowser);
+				translate.removeHandler("done", handler);
 			} catch(e) {}
-		});
+		};
+		translate.setHandler("done", handler);
 		translate.decrementAsyncProcesses("Zotero.Utilities.Translate#processDocuments");
 	}, myException, true, translate.cookieSandbox);
 }