Log Message:
Update to 28.0

Changelog:
NEW
VP9 video decoding implemented
NEW
Mac OS X: Notification Center support for web notifications
NEW
Horizontal HTML5 audio/video volume control
NEW
Support for Opus in WebM
CHANGED
Now that spdy/3 is implemented support for spdy/2 has been removed and servers \ 
without spdy/3 will negotiate to http/1 without any penalty
DEVELOPER
Support for MathML 2.0 'mathvariant' attribute
DEVELOPER
Background thread hang reporting
DEVELOPER
Support for multi-line flexbox in layout
FIXED
Various security fixes

Fixed in Firefox 28
MFSA 2014-32 Out-of-bounds write through TypedArrayObject after neutering
MFSA 2014-31 Out-of-bounds read/write through neutering ArrayBuffer objects
MFSA 2014-30 Use-after-free in TypeObject
MFSA 2014-29 Privilege escalation using WebIDL-implemented APIs
MFSA 2014-28 SVG filters information disclosure through feDisplacementMap
MFSA 2014-27 Memory corruption in Cairo during PDF font rendering
MFSA 2014-26 Information disclosure through polygon rendering in MathML
MFSA 2014-25 Firefox OS DeviceStorageFile object vulnerable to relative path escape
MFSA 2014-24 Android Crash Reporter open to manipulation
MFSA 2014-23 Content Security Policy for data: documents not preserved by \ 
session restore
MFSA 2014-22 WebGL content injection from one domain to rendering in another
MFSA 2014-21 Local file access via Open Link in new tab
MFSA 2014-20 onbeforeunload and Javascript navigation DOS
MFSA 2014-19 Spoofing attack on WebRTC permission prompt
MFSA 2014-18 crypto.generateCRMFRequest does not validate type of key
MFSA 2014-17 Out of bounds read during WAV file decoding
MFSA 2014-16 Files extracted during updates are not always read only
MFSA 2014-15 Miscellaneous memory safety hazards (rv:28.0 / rv:24.4)