Many site issues can be caused by corrupt cookies or cache. * Clear the Cache Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now" and * Remove Cookies '''''Warning ! ! '' This will log you out of all sites you're logged in to.''' Press the '''Alt''' or '''F10''' key to bring up the tool bar. Followed by; Windows; '''Tools > Options''' Linux; '''Edit > Preferences''' Mac; ''application name'' '''> Preferences''' Then '''Privacy.''' Under '''History''', select Firefox will '''Use Custom Settings'''. There is a button on the right side called '''Show Cookies'''. If there is still a problem, '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]''' {web link} While you are in safe mode; Press the '''Alt''' or '''F10''' key to bring up the tool bar. Followed by; Windows; '''Tools > Options''' Linux; '''Edit > Preferences''' Mac; ''application name'' '''> Preferences''' Then '''Advanced > General.''' Look for and turn off '''Use Hardware Acceleration'''. Poke around safe web sites. Are there any problems? Then restart.