--- a/browser/base/content/test/static/browser_all_files_referenced.js
+++ b/browser/base/content/test/static/browser_all_files_referenced.js
@@ -228,16 +228,25 @@ var whitelist = [
 if (AppConstants.NIGHTLY_BUILD && AppConstants.platform != "win") {
   // This path is refereneced in nsFxrCommandLineHandler.cpp, which is only
   // compiled in Windows. Whitelisted this path so that non-Windows builds
   // can access the FxR UI via --chrome rather than --fxr (which includes VR-
   // specific functionality)
   whitelist.push({ file: "chrome://fxr/content/fxrui.html" });
 }
 
+if (!AppConstants.NIGHTLY_BUILD || AppConstants.platform == "android") {
+  // Bug 1656680, should be removed after Bug 1651111 lands.
+  // The l10n build system can't package string files only for some platforms.
+  // Referenced by aboutGlean.html
+  whitelist.push({
+    file: "resource://gre/localization/en-US/toolkit/about/aboutGlean.ftl",
+  });
+}
+
 whitelist = new Set(
   whitelist
     .filter(
       item =>
         "isFromDevTools" in item == isDevtools &&
         (!item.skipUnofficial || !AppConstants.MOZILLA_OFFICIAL) &&
         (!item.platforms || item.platforms.includes(AppConstants.platform))
     )