[bugzilla-gnome-org-extensions] Work around issues when Firefox is set to ask about cookies

[Krzesimir Nowak <krnowak src gnome org>]

commit 6878b774e1f6984164ac5db21ffb2bef0d88f351
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Mon Sep 28 14:28:38 2009 -0400

    Work around issues when Firefox is set to ask about cookies
    
    When Firefox is set to ask about cookies, attempting to access
    localStorage throws a security exception. Catch that and pretend
    that localStorage isn't there.

 js/reviewStorage.js |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/js/reviewStorage.js b/js/reviewStorage.js
index 63939bc..e4185f5 100644
--- a/js/reviewStorage.js
+++ b/js/reviewStorage.js
@@ -22,7 +22,15 @@ function LocalReviewStorage() {
 }
 
 LocalReviewStorage.available = function() {
-    return 'localStorage' in window && window.localStorage != null;
+    // The try is a workaround for
+    //   https://bugzilla.mozilla.org/show_bug.cgi?id=517778
+    // where if cookies are disabled or set to ask, then the first attempt
+    // to access the localStorage property throws a security error.
+    try {
+        return 'localStorage' in window && window.localStorage != null;
+    } catch (e) {
+        return false;
+    }
 };
 
 LocalReviewStorage.prototype = {