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 using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?

While you are in Troubleshoot(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 decided to try a less "dangerous" approach and logged in the site from Brave and changed the password. Then logged out and went back to Firefox and went back to the site and used the new login. That worked. Of course it seems it was a corrupt cookie on my system. Or something else? However I use C cleaner on shut down and startup daily and it had no effect on clearing the problem. Of course my assumption is just that. The new password was a work around if that is a clue as to the problem. That was the only site that was having a issue.

That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems. Go to that post and click the 'Solved' button to its right.

We do not recommend using other programs to clean Firefox because they could corrupt the files. Also, the browser can clean itself.