This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Can no longer log onto most web sites...

  • 1 reply
  • 0 have this problem
  • 1 view
  • Last reply by cor-el

more options

I think I accidentally changed the proxy settings on Firefox for Mac V. 106.0.1. I get an error message with most websites now, including all Google sites, stating

"Secure Connection Failed. An error occurred during a connection to www.google.com. PR_END_OF_FILE_ERROR. The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem." Please advise..

Roger Matile [email removed from public]

I think I accidentally changed the proxy settings on Firefox for Mac V. 106.0.1. I get an error message with most websites now, including all Google sites, stating "Secure Connection Failed. An error occurred during a connection to www.google.com. PR_END_OF_FILE_ERROR. The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem." Please advise.. Roger Matile [email removed from public]

Modified by James

All Replies (1)

more options

You can try to disable DNS over HTTPS.

Are you using a proxy or VPN?

You can check the connection settings.

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

If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See "Firefox connection settings":

See also: