This week Mozilla updated all versions of Firefox, including the beta of the upcoming Firefox 4, to fix stability problems that crashed the browser.Firefox 3.6.10 and Firefox 3.5.13, which Mozilla launched late Wednesday, addressed what Mozilla said was "a single stability issue affecting a limited number of users."

A crash problem surfaced last week after Mozilla released Firefox 3.6.9 and Firefox 3.5.12 to patch 15 vulnerabilities. Users of all three editions -- Windows, Mac and Linux -- reported repeated crashes during browser startup after they'd updated to Firefox 3.6.9/3.5.12. Mozilla halted updates while its investigated. The company has since restarted automatic update delivery.