Patches have been released for Firefox 1.5.0.9, Firefox 2.0.0.1 and Thunderbird 1.5.0.9 and are being sent out over the next few days. Eight holes, five of them rated 'critical', have been patched in the new Firefox browser.
"If you already have Firefox 1.5.x, Firefox 2.0.x or Thunderbird 1.5.x, you will receive an automated update notification within 24 to 48 hours," said the organisation.
"This update can also be applied manually by selecting 'Check for Updates' from the Help menu at any time."
The Firefox flaws covered a variety of problems, including the browser's RSS feed, processing remote code and the JavaScript handling software.
Mozilla also said that it will continue to support Firefox 1.5.x until 24 April next year, but it strongly advised users to upgrade to version 2.0.
Seven flaws, six of them rated 'critical', have been fixed in the group's Thunderbird software. They include mail header processing problems and crashes with evidence of memory corruption.
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