If clearing the cookies doesn't help then it is possible that the file cookies.sqlite that stores the cookies is corrupted.

Rename (or delete) cookies.sqlite (cookies.sqlite.old) and delete other present cookie files like cookies.sqlite-journal in the Firefox Profile Folder in case the file cookies.sqlite got corrupted.

• http://kb.mozillazine.org/Cookies

Start Firefox in Use Troubleshoot Mode in Firefox to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.
• https://support.mozilla.org/kb/Safe+Mode

Thank you for trying to help. I never could find any files marked cookies.sqlite. I finally found my folder (I think) and deleted a lot, but none of the cookies will stay deleted.

I went to the website, but couldn't get that either. Next I will try the Safe Mode. ( :

You can use this button to go to the Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory: Open Containing Folder

I think it is fixed. On restart, it shows no cookies. I will now use Cookie Whitelist to agg cookies as desired, THANK YOU.

You're welcome