Update to Firefox 31.7.0esr (important)

update to Firefox 31.7.0esr bnc930622 MFSA 2015-46/CVE-2015-2708 Miscellaneous memory safety hazards MFSA 2015-47/VE-2015-0797 bmo1080995 Buffer overflow parsing H.264 video with Linux Gstreamer MFSA 2015-48/CVE-2015-2710 bmo1149542 Buffer overflow with SVG content and CSS MFSA...