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- Filename: Firefox 3.1 Beta 1.exe
- Filesize: 7.38 MB (7,733,752 bytes)
- Requirements: Windows 2000/XP/2003/Vista/XP64/Vista64

Firefox 3.1 Beta 1 is based on the Gecko 1.9.1 rendering platform, which has been under development for the past 6 months. Gecko 1.9.1 is an incremental release on the previous version with significant changes to improve web compatibility, performance, and ease of use:

* Web standards improvements in the Gecko layout engine
* Added support for CSS 2.1 and CSS 3 properties
* A new tab-switching shortcut that shows previews of the tab you're switching to
* Improved control over the Smart Location Bar using special characters to restrict your search
* Support for new web technologies such as the and elements, the W3C Geolocation API, JavaScript query selectors, web worker threads, SVG transforms and offline applications. More information.
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