See what’s new in Firefox!

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

18.0

Firefox for Android Release

January 8, 2013

Version 18.0, first offered to Release channel users on January 8, 2013

New

  • Faster JavaScript performance via IonMonkey compiler

  • Support for Retina Display on OS X 10.7 and up

  • Preliminary support for WebRTC

Fixed

Changed

  • Experience better image quality with our new HTML scaling algorithm

  • Performance improvements around tab switching

Developer

  • Support for new DOM property window.devicePixelRatio

  • Improvement in startup time through smart handling of signed extension certificates

Developer Information

Web Platform

  • Support for W3C touch events implemented, taking the place of MozTouch events

  • Disable insecure content loading on HTTPS pages through an about:config pref

  • Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode

  • Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode

  • Certain valid WebGL drawing operations are incorrectly rejected,
    leaving incomplete rendering in affected pages

unresolved

  • If you try to start Firefox using a locked profile, it will crash (see 573369)