Why would would we do such a thing...  ;-)) see screenshot Try this option... Forget About This Site, but make sure you know the password if you login. https://support.mozilla.org/en-US/kb/remove-websites-address-bar-suggestions

And this... clear the Firefox cache https://support.mozilla.org/en-US/kb/how-clear-firefox-cache#search And this... Firefox in Safe Mode https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf

"You don't have permission to access..." errors are characteristic of a firewall that protects the server against misuse and this firewall thinks something is suspicious about the HTTP request. If you use a proxy or VPN then try to use a direct connection. You can try to clear the Cache and remove the Cookies for websites that cause problems via the padlock button or via "3-bar" Firefox menu button (Options/Preferences) to see if that fixes it. I've also seen cases where having "Resist Fingerprinting" enabled caused this issue to occur.

• https://support.mozilla.org/en-US/kb/firefox-protection-against-fingerprinting

If this all doesn't work then you can try "Forget About This Site" in the right-click context menu of an history item.

• https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox