I asked you to post links and screenshots. Found it anyway using Bing on IE8, Secunia recommended to update FF to v3.6.2, which I did yesterday and I have zero issues with it.
The following are screenshots of the Secunia PSI security scanner software and it's results.
From the Secunia website about the vulnerability you described:
Description
Some vulnerabilities have been reported in Mozilla Firefox, which can be exploited by malicious people to bypass certain security restrictions, disclose sensitive information, or compromise a user's system.
1) An integer overflow error exists in the processing WOFF fonts. This can be exploited to cause a heap-based buffer overflow and execute arbitrary code via a web page embedding a WOFF font with an overly large "origLen" field.
2) A use-after-free error when handling "multipart/x-mixed-replace" images can be exploited to potentially execute arbitrary code.
3) An error in the implementation of the "window.location" JavaScript object can be exploited to bypass access restrictions imposed by certain plugins and disclose data from a different domain or from the local system.
4) Multiple errors in the browse engine can be exploited to corrupt memory and potentially execute arbitrary code.
5) An error related to the implementation of the "addEventListener()" and "setTimeout()" methods can be exploited to capture keystroke events from a cross-origin frame or window.
This is related to vulnerability #3 in:
SA26095
6) An error in the implementation of security checks used when preloading images can be exploited to perform privileged actions via certain add-ons, by specifying a restricted protocol.
7) An error in the processing of stylesheets used in XUL documents can be exploited to pollute the XUL cache and change browser style attributes.
8) An error in the implementation of the asynchronous Authorization Prompt can be exploited to potentially capture HTTP authorization credentials used for another domain.
The vulnerabilities are reported in versions prior to 3.6.2.
Solution
Update to version 3.6.2.
Provided and/or discovered by
1) Reportedly a module for VulnDisco Pack.