Firefox doesn't start despite not being already running task manager process
I have recently updated my Firefox version to the latest 3.6.3. I had the feeling the installer donload was not quite "complete", and after installing and running the installer I tryed adding plugins but the latest ones said I have version "3.0.5 MEGAUPLOAD" (I think). I assumed that was caused by the download not really finishing (appears as done after 97% was downloaded), so I redownloaded it and made sure it got up all the way to 100%, using a different download manager. It worked, and I installed firefox again with the completely downloaded installer. When I tried opening it nothing happened, and I checked the task manager but no firefox process was running.
IE Tabs Plus, colored Tabs, Aging Tabs, others I can't remember, or check since I can't open firefox.
- User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; byond_4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322; FDM)
Can't open up firefox and therefore can't access that information
Does it work if you start in Firefox Safe Mode? See Troubleshoot Firefox issues using Safe Mode
Check the general.useragent prefs on the about:config page. You can open the about:config page via the location bar, just like you open a website. Filter: general.useragent If any general.useragent prefs are bold (user set) then right-click that pref and choose Reset.
See Find what version of Firefox you are using and Web sites or add-ons incorrectly report incompatible browser See also http://kb.mozillazine.org/Resetting_your_useragent_string_to_its_compiled-in_default