Solution:   Update to FF 5.0 (now available) via internal updater in v4.0.1
The following has been "adapted" from [URL]   and  [URL]   : Description [A third-party] has reported a [non-critical] weakness in Mozilla Firefox 4, which can be exploited by malicious people to disclose potentially sensitive [private/confidential] information.An unspecified error in [Firefox's] WebGL implementation can be exploited to disclose certain information e.g. screenshots of a victim's desktop.The weakness is reported in version 4.0.1. Other versions may also be affected. SolutionThe vendor recommends to [temporarily] disable WebGL. Mozilla has [tentatively] scheduled a fix for 2011-06-21. ========= Since this weakness is rated "non-critical", and since it should be fixed in just a few days, users can decide whether or not they wish to implement the suggested temporary work-around.    If you do, you'll probably have to UNdo it when the fixed version is released.    Here's how to [temporarily] disable WebGL: in Firefox, in the address bar, type-in about:config and press ENTER you'll receive a scary warning that proceeding might void your warranty... click on I'll be careful, I promise! Scroll down to highlight webgl.disabled RIGHT-click, and select   Toggle this will change from the default status of false to the user set status of true
Now patched: Firefox WebGL Graphics Memory Information Disclosure Weakness