Firefox 9 Available, Speeds Up JavaScript

The latest version of Firefox is available for download, bringing some speed increases, better integration with OS X for Mac users, and lots of stability improvements.

You won't see it on the official Mozilla page yet, but the download is up and ready to go ahead of tomorrow's official release. This new version includes:

  • 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

ExtremeTech is reporting 20 to 30 per cent increases in speed compared to Firefox 8, due to the new type interference feature in its JavaScript engine. For the full list of changes, check out Mozilla's full changelog. Hit the links below to download the new version.

Firefox 9 for Windows, Mac OS X, and Linux [Mozilla via ExtremeTech


    Yawn, who cares. Chrome destroys Firefox for speed.

      You should try Opera

        Opera is the worst. Took about 10x longer than Internet Explorer and IE sucks balls. Chrome ftw.

      I would switch to chrome, but it is missing a few minor UI things - no live bookmarks (I find them much better than a feed reader) and the lack of a dropdown for the location bar (those quick shortcuts with the mouse save me a lot of effort).

    What? Didnt we just get 8.0 a week ago?

      With 6 and 7 a week before that...

    Haha, a new version per week, fast enough,uh?
    All the browser update themselves frequently.
    That's why I rather stay with my Avant browser and sit there to see each update of other browsers.

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