The following Security Issues have been fixed in FireFox 2.0.0.6.
Previous FireFox versions did not percent-encode spaces and double-quotes in URIs handed off to external programs for handling, which can cause the receiving program to mistakenly interpret a single URI as multiple arguments. This bug is fixed in FireFox 2.0.0.6.
Privilege escalation through chrome-loaded about:blank windows issue also has been fixed in FireFox 2.0.0.6.
Due to Security Fixes, Mozilla recommends all of it's users to upgrade to latest FireFox 2.0.0.6
Download FireFox 2.0.0.6