Today, Firefox 1.0.7 is released with the security and stability updates that were floating around the web. Here is the fixes from the release announcement:

Fixes are included for the international domain name (IDN) link buffer overflow vulnerability and the Linux command line URL parsing flaw. There are also other security and stability changes, including a fix for a crash experienced when using certain Proxy Auto-Config scripts. In addition, some regressions introduced by previous 1.0.x security updates have been resolved.

The Mozilla Foundation previously issued a patch for Firefox 1.0.6 that protected users against the IDN link buffer overflow flaw at the expense of removing support for IDNs. Firefox 1.0.7 has a more permanent solution that does not involve disabling IDN functionality and any users who installed the patch will find that IDN support is restored when they upgrade

Download link: Firefox 1.0.7