diff --git a/chrome/content/zotero/xpcom/file.js b/chrome/content/zotero/xpcom/file.js
index 83940dcf10..42e82e54ed 100644
--- a/chrome/content/zotero/xpcom/file.js
+++ b/chrome/content/zotero/xpcom/file.js
@@ -107,11 +107,11 @@ Zotero.File = new function(){
 		}
 		
 		var dir = OS.Path.dirname(file);
-		while (dir && !await OS.File.exists(dir)) {
+		while (dir && dir != '/' && !await OS.File.exists(dir)) {
 			dir = OS.Path.dirname(dir);
 		}
 		
-		return dir || false;
+		return (dir && dir != '/') ? dir : false;
 	}
 	
 	
diff --git a/chrome/content/zotero/xpcom/translation/translator.js b/chrome/content/zotero/xpcom/translation/translator.js
index c7418dd2fb..5ad6388b7d 100644
--- a/chrome/content/zotero/xpcom/translation/translator.js
+++ b/chrome/content/zotero/xpcom/translation/translator.js
@@ -215,4 +215,7 @@ Zotero.Translator.replaceDeprecatedStatements = function(code) {
 
 Zotero.Translator.RUN_MODE_IN_BROWSER = 1;
 Zotero.Translator.RUN_MODE_ZOTERO_STANDALONE = 2;
-Zotero.Translator.RUN_MODE_ZOTERO_SERVER = 4;
\ No newline at end of file
+Zotero.Translator.RUN_MODE_ZOTERO_SERVER = 4;
+Zotero.Translator.TRANSLATOR_TYPES = TRANSLATOR_TYPES;
+Zotero.Translator.TRANSLATOR_OPTIONAL_PROPERTIES = TRANSLATOR_OPTIONAL_PROPERTIES;
+Zotero.Translator.TRANSLATOR_REQUIRED_PROPERTIES = TRANSLATOR_REQUIRED_PROPERTIES;
diff --git a/chrome/content/zotero/xpcom/translation/translators.js b/chrome/content/zotero/xpcom/translation/translators.js
index 60fbf167d2..3936466127 100644
--- a/chrome/content/zotero/xpcom/translation/translators.js
+++ b/chrome/content/zotero/xpcom/translation/translators.js
@@ -181,10 +181,10 @@ Zotero.Translators = new function() {
 					
 					// add to cache
 					_translators[translator.translatorID] = translator;
-					for (let type in TRANSLATOR_TYPES) {
-						if (translator.translatorType & TRANSLATOR_TYPES[type]) {
+					for (let type in Zotero.Translator.TRANSLATOR_TYPES) {
+						if (translator.translatorType & Zotero.Translator.TRANSLATOR_TYPES[type]) {
 							_cache[type].push(translator);
-							if ((translator.translatorType & TRANSLATOR_TYPES.web) && translator.targetAll) {
+							if ((translator.translatorType & Zotero.Translator.TRANSLATOR_TYPES.web) && translator.targetAll) {
 								_cache.webWithTargetAll.push(translator);
 							}
 						}
@@ -193,8 +193,8 @@ Zotero.Translators = new function() {
 					if (!dbCacheEntry) {
 						yield Zotero.Translators.cacheInDB(
 							fileName,
-							translator.serialize(TRANSLATOR_REQUIRED_PROPERTIES.
-												 concat(TRANSLATOR_OPTIONAL_PROPERTIES)),
+							translator.serialize(Zotero.Translator.TRANSLATOR_REQUIRED_PROPERTIES.
+												 concat(Zotero.Translator.TRANSLATOR_OPTIONAL_PROPERTIES)),
 							lastModifiedTime
 						);
 					}