Firefox will not open when launched in XP

I have tried to get help from Mozilla and they suggested Microsoft help.  Here is the link of what has transpired with Mozilla Help thus far.  I have been working to fix this problem since 7/13/17.


This all happened after the last Microsoft Update on 7/13/17

Firefox is running in Task Manager even though Firefox window never opened after launch.

I have a Compaq with XP SP3, Firefox 49.0.1 and tried 52.0.2, AVG Security, Malwarebytes, SuperAntiSpyware & SpywareBlaster. The only browser I have that works now is Google Chrome.

I have uninstalled Microsoft Security Essentials because of the errors 0x80070002 and 0x8004FF52

I have uninstalled Firefox but can't download a new version. IE will launch, window will open, but nothing loads.

For issue with Firefox, you need to contact their support.

Support for Windows XP is already ended:

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Question Info

Last updated May 24, 2018 Views 64 Applies to: