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Mozilla fixes critical flaws with new Firefox 5 browser, Thunderbird email client

In its Firefox 5 release this week, Mozilla fixed eight flaws in the browser, including five critical flaws. Among the critical flaws, the company fixed problems with the browser’s handling of the WebGL 3-D rendering standard. The company released Firefox 5 on an accelerated schedule, having just released Firefox 4 three months ago.

Mozilla also fixed three vulnerabilities in Firefox 4.0.1, including two critical flaws, and six fixes in Firefox 3.6.18, including five critical flaws.

In addition, Mozilla fixed two vulnerabilities in its Thunderbird 3.1.10 email client, including one critical one.

The Firefox 5 update includes a Do Not Track feature for Android, which makes Firefox the first browser to support Do Not Track on multiple platforms, Mozilla said. The Do Not Track feature, which enables users to tell websites that they want to opt-out of online behavior tracking, is more visible in the Firefox Preferences menu.

With the Firefox 5 update, Mozilla no longer plans to issue security updates for Firefox 4. "Firefox 5 will be the security update for Firefox 4", said Christian Legnitto, Firefox release manager, in a mailing list thread.

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