windows xp blues: Firefox js3250.dll problem

Suddenly my firefox failed to start stating that js3250.dll is not found. I reinstalled firefox and it started working .When i clicked an icon in the desktop got the error "Can't load library from memory". Firefox crashed abruptly. Without having any clue of what is happening i googled for an hour and found this working solution!This is the only solution that worked

Go to C:\Windows\System32\ipv6monl.dll and delete it. Reinstall Firefox and it will work fine

This is the only solution that worked.Thanks to the link given below

http://anothermonkey.blogspot.com/2007/01/computers-bloody-computers-firefox-and.html