--- a/toolkit/modules/Troubleshoot.jsm
+++ b/toolkit/modules/Troubleshoot.jsm
@@ -429,31 +429,39 @@ var dataProviders = {
       .parseFromString("<html/>", "text/html");
 
     function GetWebGLInfo(contextType) {
         let canvas = doc.createElement("canvas");
         canvas.width = 1;
         canvas.height = 1;
 
 
-        let creationError = "(no info)";
+        let creationError = null;
 
         canvas.addEventListener(
             "webglcontextcreationerror",
 
             function(e) {
                 creationError = e.statusMessage;
             },
 
             false
         );
 
-        let gl = canvas.getContext(contextType);
+        let gl = null;
+        try {
+          gl = canvas.getContext(contextType);
+        }
+        catch (e) {
+          if (!creationError) {
+            creationError = e.toString();
+          }
+        }
         if (!gl)
-            return creationError;
+            return creationError || "(no info)";
 
 
         let infoExt = gl.getExtension("WEBGL_debug_renderer_info");
         // This extension is unconditionally available to chrome. No need to check.
         let vendor = gl.getParameter(infoExt.UNMASKED_VENDOR_WEBGL);
         let renderer = gl.getParameter(infoExt.UNMASKED_RENDERER_WEBGL);
 
         let contextInfo = vendor + " -- " + renderer;