Mozilla also released Firefox 3.6.23 yesterday, a security update that patched four vulnerabilities. That aging edition -- Mozilla first shipped Firefox 3.6 in January 2010 -- is still maintained, in part because enterprise users have resisted adopting the rapid release cadence.
As part of a proposal called Extended Support Release, Mozilla plans to halt Firefox 3.6 security updates three months after it kicks off a less-frequent shipping schedule for corporations.
Firefox 7 can be downloaded manually from Mozilla's site, while people running Firefox 4, 5 or 6 will be offered the upgrade through the browser's own update mechanism.
The next version of Firefox is currently scheduled for release on Nov. 8.
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