https://support.mozilla.org/en-US/kb/websites-say-cookies-are-blocked-unblock-them Make sure you are not blocking content. https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop also see https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/ https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection --------------- [https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode Diagnose Firefox issues using Troubleshoot(Safe) Mode] {web link} A small dialog should appear. Click '''Start In Troubleshoot(Safe) Mode''' (not Refresh). Is the problem still there? 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. * [https://support.mozilla.org/en-US/kb/delete-cookies-remove-info-websites-stored Delete cookies to remove the information websites have stored on your computer] {web link} * [https://support.mozilla.org/en-US/kb/how-clear-firefox-cache How to clear the Firefox cache] {web link}

Thank you for the information. Unfortunately I couldn't get any changes to make a difference. I solved the problem by using Edge browser (even Safari worked). Edge has a specific setting for turning on/off blocking third-party cookies, so turning it off was one click, in one place. Firefox is still my first choice, but this was really a waste of time and effort.

[v57+]Type '''about:preferences#privacy''' Under '''Enhanced Tracking Protection''' select '''Standard'''

Thank you very much...I hope this will turn off third-party cookies blocking. If not, as I mentioned earlier, for the limited number of times I need it turned off, I can just use Edge. Your help is much appreciated. Michael