Works for me. see screenshot What OS? If windows, home or pro and what security software are you running besides MS Defender? What version of Firefox? Do you have the same issue with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf

THanks for the reply

As said only happens every so often ............ yesterday was fine and this morning got

Access Denied You don't have permission to access "http://www.dailymail.co.uk/home/index.html" on this server.

Reference #18.1bc35068.1750147775.119ac900

https://errors.edgesuite.net/18.1bc35068.1750147775.119ac900

Running latest FireFox all up to date

On Window 11

Only started last week

I have made no changes to my PC settings

What security software are you running besides MS Defender?

Do you have the same issue with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf

Did you try clearing the browser cache? https://support.mozilla.org/en-US/kb/how-clear-firefox-cache#

Are you running pro version of Windows? If so, you should have Windows Sandbox enabled for testing. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/