Mozilla’s Firefox 4 Beta 1 considered to be stable and safe to use for daily web browsing, though the features and content may change before the final product release. At this time many Add-ons may not yet have been tested by their authors to ensure that they are compatible with this release.
New Tab Location – Tabs are given top visual priority for more efficient and intuitive browsing. New Add-Ons Manager – An easier way to manage your add-ons and discover new options for personalizing your browsing. WebM and HD Video – As pioneers of HTML5 video standards, Firefox also supports the WebM format so you can watch open HD quality video. Protecting Your Privacy – Firefox puts your privacy first, fixing flaws in some web standards that allow bad guys to snoop around and expose your browser history. Crash Protection – Firefox provides uninterrupted browsing for Windows, Linux, and now Mac when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins. If one of these commonly-used plugins crashes or freezes, it won’t affect the rest of Firefox. Instead, you can simply reload the page to restart the plugin and try again.
Download –> Firefox 4 Beta 1