From e8417acbff563634f11f25461d953b951caac056 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Mon, 17 Feb 2020 12:33:34 +0100
Subject: Issue #1446 - Only allow extension add-on types for Firefox compat
 mode.

---
 toolkit/mozapps/extensions/internal/XPIProvider.jsm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/toolkit/mozapps/extensions/internal/XPIProvider.jsm b/toolkit/mozapps/extensions/internal/XPIProvider.jsm
index 600ec2ff5..2f298a934 100644
--- a/toolkit/mozapps/extensions/internal/XPIProvider.jsm
+++ b/toolkit/mozapps/extensions/internal/XPIProvider.jsm
@@ -6472,8 +6472,8 @@ AddonInternal.prototype = {
     }
     else if (app.id == FIREFOX_ID) {
      version = FIREFOX_APPCOMPATVERSION;
-      if (this.type == "locale")
-        //Never allow language packs in Firefox compatibility mode
+      if (this.type != "extension")
+        //Only allow extensions in Firefox compatibility mode
         return false;
 #endif
     }
-- 
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