A new Firefox update was released this afternoon that fixes some pretty serious security issues.
Unauthorized access to wyciwyg:// documents
Remote code execution by launching Firefox from Internet Explorer
File type confusion due to %00 in name
Privilege escalation using an event handler attached to an element not in the document
Frame spoofing while window is loading
XSS using addEventListener and setTimeout
Crashes with evidence of memory corruption
No matter how bad they were they are fixed now and I have to admit it would take a lot for me to move away from this wonderful browser. Get it now!