What’s New in Mozilla Firefox 18
NEW
Faster JavaScript performance via IonMonkey compiler
NEW
Support for Retina Display on OS X 10.7 and up
NEW
Preliminary support for WebRTC
CHANGED
Experience better image quality with our new HTML scaling algorithm
CHANGED
Performance improvements around tab switching
DEVELOPER
Support for new DOM property window.devicePixelRatio
DEVELOPER
Improvement in startup time through smart handling of signed extension certificates
HTML5
Support for W3C touch events implemented, taking the place of MozTouch events
FIXED
Disable insecure content loading on HTTPS pages (62178)
FIXED
Improved responsiveness for users on proxies
Known Issues
Unresolved
Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (see 825205)
Unresolved
If you try to start Firefox using a locked profile, it will crash (see 573369)
Unresolved
For some users, scrolling in the main GMail window will be slower than usual (see 579260)
Unresolved
Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Unresolved
Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (see 802274)
Unresolved on v18 Resolved in v19
Unresolved
Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode (see 825734)
Try Beta/Aurora/Nightly if you care about the WebGL issue
