I'm a little late on this one, but Mozilla recently released a new version of Firefox, Firefox 1.0.5.

1.0.5 was a stability update, and fixed a few security bugs. Shortly after the release, there came Firefox 1.0.6. Apparently with 1.0.5 some extensions stopped working, so 1.0.6 is a fix for that screw-up.

As always, you can get the latest release from www.getfirefox.com.