Mozilla has silently released the second beta version of its upcoming web browser Firefox 3.1, codenamed Shiretoko. Scheduled for release on November 21, the second beta is finally out for developer testing and public feedback. Majority of the Firefox add-ons won't work on this beta. The installer for Windows, Mac OS X, and Linux platforms can be downloaded from here; you have to choose your preferred language from the 54 languages provided.
As mentioned in the preview report on Firefox 3.1 Beta 2, it is based on Gecko 1.9.1 rendering platform and has "Private Browsing Mode." Also, the web browsing traces and browsing history can be removed.
The "TraceMonkey" JavaScript engine is on by default for web content unlike the first beta of the Firefox 3.1 browser. The 3D-like tab switching user interface has been removed based on user feedback, but we liked it! For faster content loading, the Gecko layout engine has been improved.
We put the second beta to an Acid3 test, and it scored an impressive 92/100, which is a bit less than the Opera 10 Alpha released recently, which scored 100/100.
The second beta also supports Web Worker Thread specifications that will allow Web apps to run in the background, which will speed up applications for developers.
There is support for video and audio features of new web technologies like the W3C Geolocation add-on. After installing this beta, one might face problems while browsing JavaScript-based sites, which adhere to old W3 standards.
For more details, check out the Firefox 3.1 Beta 2 release notes.