Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

I tried all the suggestions in the other reply. (great suggestions) But none of which worked. However, I had the "Block new requests asking to access your location" checked. (See Privacy & Security, Permissions section and the "settings" button next to Location.) Every time you login to the web site it wants to know your location. I removed the "check mark" and let the request, popup. On the popup I click on "do not allow". The web site works just fine. GO FIGURE

That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems.