You have probably already seen and read the article [[firefox crashes]]. If it does crash do you see the crash reporter,and can you paste a recent CrashID into your next post please. The crash ID you mention is an old one * 2d3f4594-f1bf-494d-9c25-8be712101126 <br> the last part is the date in yymmdd format 26th November 2010 Firefox may not actually be crashing. *See also [[firefox hangs]] If firefox is hanging check for and kill any running firefox.exe &/or plugincontainer.exe process. What security software is in use. Possibly security software is interfering with firefox use. Have you managed to use firefox since it was updated to Firefox 11. If Firefox is crashing at startup. #Try a clean profile #* see [[Managing profiles?#w_creating-a-profile]]_creating-a-profile # Try starting in Windows own safe mode, usually accessible by using keyboard F8 at startup #Try disabling security software. If necessary temporarily uninstall security software. (Remember to re-enable re-install, consider working physically offline for safety if testing without security software )