Some vulnerabilities have been reported in Mozilla Firefox, which can be exploited by malicious people to bypass certain security restrictions, disclose sensitive information, conduct cross-site scripting attacks, or potentially compromise a user's system.

Some vulnerabilities have been reported in Mozilla Firefox, which can be exploited by malicious people to bypass certain security restrictions, disclose sensitive information, conduct cross-site scripting attacks, or potentially compromise a user's system.

1) Multiple errors in the layout and JavaScript engines can be exploited to corrupt memory and potentially execute arbitrary code.

2) An error when processing the "persist" XUL attribute can be exploited to bypass cookie settings and uniquely identify a user in subsequent browsing sessions.

3) Multiple errors can be exploited to bypass the same-origin policy, disclose sensitive information, and execute JavaScript code with chrome privileges.

For more information see vulnerabilities #4 through #10 in:
SA33184

The vulnerabilities are reported in versions prior to 3.0.5.

Update to version 3.0.5.
http://www.mozilla.com/en-US/products/download.html?product=firefox-3.0.5