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Firefox 3.5 Beta Released

Gordon Kelly


Firefox 3.5 Beta Released

Firefox 3.5 is inching ever closer ladies and gents and for all of you brave enough to test the beta versions a major new release has just popped out this morning...

'Firefox 3.5 Beta 4' is the first iteration of Mozilla's next generation browser to drop the '3.1' moniker and it brings about a whole host of changes, namely:

  • The beta is now available in 70 languages - get your local version.

  • Improved tools for controlling your private data, including a Private Browsing Mode.

  • Better performance and stability with the new TraceMonkey JavaScript engine.

  • The ability to provide Location Aware Browsing using web standards for geolocation.

  • Support for native JSON, and web worker threads.

  • Improvements to the Gecko layout engine, including speculative parsing for faster content rendering.

  • Support for new web technologies such as: HTML5 and elements, downloadable fonts and other new CSS properties, JavaScript query selectors, HTML5 offline data storage for applications, and SVG transforms.
Now while speed is all well and good, the big features here are Porn Mode Private Browsing and support for HTML5, the latter vital in evolving offline access for web based services such as Gmail.

"Firefox 3.5 Beta 4 is the sixth development milestone and fourth beta release of Firefox 3.5, the next version of the Firefox web browser," said Mozilla in the announcement. "While this release is considered to be stable, it is intended for developers and members of our testing community to use for early evaluation and feedback. Users of the latest released version of Firefox should not expect all of their add-ons to work properly with this beta."

As always the last point is vital. Popular add-ons such as Tab Mix Plus, TwitterFox and XMarks are all incompatible at the time of writing (deal breakers for me) so holding off a few days might be advisable for some. Everyone else, dive in now!

In related news: Firefox 3.0.10 is now doing the rounds just a week after Firefox 3.0.9 - yep, it's another security fix. No denying Mozilla is diligent...


Firefox 3.5 Beta 4 Release Notes


April 28, 2009, 8:28 pm

Why do they call it Private Browsing Mode? They should just call it porn mode :P


April 28, 2009, 8:50 pm

I like it, it even accepts the three-finger swipe to go forward and backwards on my MacBook


April 28, 2009, 8:56 pm

Note to all: Firefox 'Nightly Tester Tools' will force operation of any add-on you may have but can obviously affect performance/stability. That said, it has worked fine with Twitterfox, Tab Mix Plus and Xmarks for me.


April 28, 2009, 9:01 pm

I assume the "private browsing mode" keeps details of the pages you visit off your own history pages, but will it stop the Government, or your ISP keeping a record of the pages you visit?

Will it stop the PHORN (I think it is) people popping adverts up that they wish to, as they record what you do.

There is private & there IS PRIVATE!


April 28, 2009, 10:24 pm

@mark - there is guilty & there is sounding REALLY GUILTY ;)


April 29, 2009, 6:18 am

@Gordon - You can download a dev build of Tab Mix Plus, which is compatible with the new 3.5 beta from:


Hamish Campbell

April 29, 2009, 12:47 pm

I'm a fan. Was hard dealing with firefox 3.0 at work when I was getting much better performance on safari 4 on my mac at home. But safari 4 for windows can't be changed to open new links in a tab so here at work its a no go for me. And chrome doesn't have adblock.

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