What version of Firefox? What OS? What security software are you running? It works for me. see screenshots

I have been working fine until this afternoon and all of a sudden I have been unable to log into my email account via TB and get the following error msg for each of my 3 accounts:

Access Denied You don't have permission to access "http://login.xfinity.com/login" on this server.

Reference #18.8c200117.1726266130.5e0f5580

https://errors.edgesuite.net/18.8c200117.1726266130.5e0f5580

The bottom two lines are different on the other two email accounts but the message comes out for each of the three email accounts.

I can log in directly to via my comcast account to my email servers. What could be happening?

"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, try to use a direct connection. Select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

• Settings -> General -> Network -> Connection -> Settings

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 (Settings) to see if that fixes it.

• https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

I've seen cases where having enabled Resist Fingerprinting was causing this issue.

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

Start Firefox in Troubleshoot Mode to check if an extension is causing the problem.

• https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode

If this all doesn't work, try "Forget About This Site" in the right-click context menu of an history item. Note that this might remove saved passwords for this website, so make a note if you have any.

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