diff --git a/chrome/content/zotero/xpcom/translation/translate.js b/chrome/content/zotero/xpcom/translation/translate.js
index 565b93c2a5..cdec61e735 100644
--- a/chrome/content/zotero/xpcom/translation/translate.js
+++ b/chrome/content/zotero/xpcom/translation/translate.js
@@ -1396,7 +1396,12 @@ Zotero.Translate.Base.prototype = {
 			resolved;
 		if (!m) {
 			if (this.location) {
-				resolved = new URL(url, this.location).toString();
+				if (Zotero.isFx) {
+					resolved = Services.io.newURI(this.location, "", null).resolve(url);
+				}
+				else {
+					resolved = new URL(url, this.location).toString();
+				}
 			}
 			else if (url.startsWith('//')) {
 				// Use HTTPS by default for protocol-relative URL with no associated web page