Hi, You can try deselecting '''Use hardware acceleration when available''' via '''Tools''' ('''Alt''' + '''T''') > '''Options''' > [https://support.mozilla.org/en-US/kb/Options%20window%20-%20Advanced%20panel?as=u Advanced] > '''General'''. restart Firefox and check - a quick way to restart Firefox is to press [https://developer.mozilla.org/en-US/docs/Tools/GCLI '''Shift''' + '''F2'''], type '''restart''' and '''Enter'''. [https://support.mozilla.org/en-US/kb/Options%20window Options]

check out this link http://mzl.la/MP6ZBS i hope it helps you to solve the issue

Sorry. All of them didn't work. However I found one that did. I transferred all my documents online, created another administrator account, and deleted the old one. I could then use Firefox without it freezing.