Mozilla halts Firefox security updates

Stops serving updates to newest versions while it looks into startup crash bug

Mozilla has stopped providing security updates to Firefox users as it investigates a bug that caused computers to crash last week.

Computerworld blogger Michael Horowitz first reported on the problem last Sunday after he tried to update older editions of Firefox on several different machines.

When Horowitz asked Firefox 3.5.11, 3.6.3 and 3.6.8 if there was an update, the browsers told him no newer editions were available. Firefox's up-to-date versions are 3.5.12 and 3.6.9, which Mozilla released a week ago when it patched 15 vulnerabilities , 11 of them labeled "critical."

Computerworld staffers reproduced the issue when they tried to update a copy of Firefox 3.6.6 on Windows Vista and Firefox 3.6.8 on a Mac.

Normally, older versions of Firefox will automatically receive an update with 24-48 hours after it's released, or when the user manually selects the "Check for Updates" from the Help menu.

Monday, Mozilla said it has stopped offering Firefox 3.5.12 and 3.6.9 because of a bug that crashed some users' machines after they'd updated, then restarted the browser.

"We've limited updates to Firefox 3.6.9 and Firefox 3.5.12 at this time as we evaluate some early feedback which indicates that a subset of our user base may be finding the releases unstable," said Michael Shaver, Mozilla's head of engineering, in an e-mail reply to questions yesterday.

According to an entry in Bugzilla , Mozilla's bug and code change database, the company began receiving a large number of crash reports after releasing Firefox 3.5.12 and 3.6.9 last week. The reports have come from machines on all three platforms -- Windows, Mac and Linux -- that Firefox supports, with the majority of them occurring during browser startup.

Mozilla did not say when it would switch updates back on.

Users who want to upgrade older versions of Firefox can download 3.5.12 or 3.6.9 from Mozilla's Web site, then install them manually overtop existing copies.

Tags applicationssecuritybrowserssoftwareMalware and Vulnerabilitiesmozilla

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Gregg Keizer

Computerworld (US)

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