Mozilla today released Firefox 13, an upgrade that patched 13 vulnerabilities, including two critical flaws in the browser's update service.
Firefox also joined its rivals in finally adding a graphical "new tab" page that shows the most-frequent destinations.
Ten of the vulnerabilities patched Tuesday were rated "critical" by the open-source developer, while two were tagged "high" and one as "moderate." Mozilla uses a four-step threat scoring system, with critical the most dire.
Two of the critical bugs were in the updater and update service used by Firefox 12 on Windows, Mozilla acknowledged in an
advisory.