A number of security problems were highlighted over the weekend, with details published by Mozilla, and a new version of the browser is now available for download.
Mozilla prefers to launch a whole new browser rather than issue security updates Microsoft-style.
The new download fixes half a dozen potential security problems with the browser.
Fixed in Firefox 1.0.3
Search plugin cross-site scripting
Arbitrary code execution from Firefox sidebar panel II
Missing Install object instance checks
Privilege escalation via DOM property overrides