Firefox 9.0

Firefox v.9.0, was offered to release channel users on December 20th, 2011

What’s New in Firefox 9 [3]
The latest version of Firefox has the following changes:
* Added Type Inference, significantly improving JavaScript performance
* Improved theme integration for Mac OS X Lion
* Added two finger swipe navigation for Mac OS X Lion
* Added support for querying Do Not Track status via JavaScript
* Added support for font-stretch
* Improved support for text-overflow
* Improved standards support for HTML5, MathML, and CSS
* Fixed several stability issues
* Fixed several security issues

Fixed in Firefox 9 [4]
MFSA 2011-58 Crash scaling to extreme sizes
MFSA 2011-57 Crash when plugin removes itself on Mac OS X
MFSA 2011-56 Key detection without JavaScript via SVG animation
MFSA 2011-55 nsSVGValue out-of-bounds access
MFSA 2011-54 Potentially exploitable crash in the YARR regular expression library
MFSA 2011-53 Miscellaneous memory safety hazards (rv:9.0)

Vulnerability ratings: 4 Critical, 1 High, 1 Moderate
Affects: Windows, OSX, Linux, Android …
Evaluation: Upgrade to a dot zero release, but beware and take note of which plugins will cease to work.

Note: Automatic updates for Mac OS X and Linux have been disabled while Mozilla investigate a possible issue affecting a small number of users. The issue is unlikely to impact new users.

LINKS:
[1] Firefox Updated: Firefox 9 (2011-Dec-20) [Mozilla]
[2] Firefox features [Mozilla]
[3] Mozilla Firefox 9.0 Release Notes (2011-Dec-20) [Mozilla]
[4] Security Advisories for Firefox [Mozilla]
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