From aba5754bf1480a88b90fa295c9bad96e0e9a69fc Mon Sep 17 00:00:00 2001
From: janekptacijarabaci <janekptacijarabaci@seznam.cz>
Date: Wed, 27 Jun 2018 19:32:26 +0200
Subject: [PATCH] Fix "about:support"s "graphics" section when
 "webgl.disable-extensions" is true

---
 toolkit/modules/Troubleshoot.jsm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/toolkit/modules/Troubleshoot.jsm b/toolkit/modules/Troubleshoot.jsm
index 4c6ac558df..a862b1db46 100644
--- a/toolkit/modules/Troubleshoot.jsm
+++ b/toolkit/modules/Troubleshoot.jsm
@@ -460,7 +460,9 @@ var dataProviders = {
 
         // Eagerly free resources.
         let loseExt = gl.getExtension("WEBGL_lose_context");
-        loseExt.loseContext();
+        if (loseExt) {
+          loseExt.loseContext();
+        }
 
 
         return contextInfo;