Fixes/changes:
- Update to address startup crashes if users had previously changed the setting for Azure for Content
The rendering back-end detection routine was A Little BrokenTM and would try to use wrong settings or a back-end that wasn't valid. - Update for texture handling to restore GDI compatibility (should fix some graphics glitches on some cards/drivers)
- Fix to handle invalid PDF plugin overlay state
- Misc. additional security fixes ported over from Firefox (bug #991981, bug #995679, bug #999651, bug #1009952, bug #1011007)