Hi

This support article should help:

https://support.mozilla.org/en-US/kb/secure-connection-failed-firefox-did-not-connect

(Updated with correct link...sorry!)

Hi Thanks for your reply but this doesnt solve my problem. My problem is that my firefox browser is not connecting to any website i want not even google.I tried deleting the cache and changing the proxy setting to no proxy nothing happend. I can use chrome normally this problem only on firefox. chrome://global/content/neterror/supportpages/connection-not-secure.html I already check this article but doesnt solve my problem.

If anyone has another solution please help.

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, select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See "Firefox connection settings":

• https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors
• https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can
• https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

Boot the computer in Windows Safe Mode with network support to see if that has effect.

• https://www.bleepingcomputer.com/tuto.../how-to-start-windows-in-safe-mode/
• https://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10/