firefox33: Bug 1058091 - FATAL ERROR: Non-local network connections are disabled and a connection attempt to tiles.up.mozillalabs.com (54.243.106.119) was made.

Already uplifted to mozilla-aurora: https://hg.mozilla.org/releases/mozilla-aurora/rev/67de711e13d9
(cherry picked from commit eedf51a3dd1410556f17f2ada0e4f8b623f7f68c)