update to Firefox 24.7.0 and Thunderbird 24.7.0
including fixes for

* MFSA 2014-56/CVE-2014-1547/CVE-2014-1548
Miscellaneous memory safety hazards
* MFSA 2014-61/CVE-2014-1555 (bmo#1023121)
Use-after-free with FireOnStateChange event
* MFSA 2014-62/CVE-2014-1556 (bmo#1028891)
Exploitable WebGL crash with Cesium JavaScript library
* MFSA 2014-63/CVE-2014-1544 (bmo#963150)
Use-after-free while when manipulating certificates in the trusted cache
(solved with NSS 3.16.2 requirement)
* MFSA 2014-64/CVE-2014-1557 (bmo#913805)
Crash in Skia library when scaling high quality images
- require NSS 3.16.2