What is the exact error messages? There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own. 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 https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message [https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors?redirectlocale=en-US&redirectslug=Error+loading+web+sites Websites don't load - troubleshoot and fix error messages] http://kb.mozillazine.org/Error_loading_websites

Thanks for your reply. That makes sense, ive just signed up with ESET. Exact error message says: An error occurred during a connection to discussions.apple.com. Peer received a valid certificate, but it’s access was denied. Error code: SSL_ERROR_ACCESS_DENIED_ALERT How do I fix it though?? Thank you

The code SSL_ERROR_ACCESS_DENIED_ALERT doesn't come up here very often. Was the error message referring to Apple's discussion forum coming up in an expected context, such as a link to those forums? I certainly wouldn't expect you to see that one when you want to access Gmail... Do you access the internet through a business network (either from inside the office or via VPN)? Please scan through these threads for discussion of things that worked or didn't work. I wouldn't say there are any definitive solutions here yet, but various things that seem to have helped in some cases: * [https://support.mozilla.org/questions/1162567 SSL_ERROR_ACCESS_DENIED_ALERT] - Firefox 53, resolved by clearing the HSTS state file and disabling or removing the Pushbullet extension * [https://support.mozilla.org/questions/1178098 SSL_ERROR_ACCESS_DENIED_ALERT Improperly reported and can't be bypassed] - problem in beta test version of Firefox 57, not resolved, problem not present in final release version of Firefox 57 * [https://support.mozilla.org/questions/1219165 Why can't I connect to wellknown charity websites eg Unicef, Compassion in World Farming, etc?] - Firefox 60, clearing cache and cookies marked as solution, but not confirmed with a reply * [https://support.mozilla.org/questions/1227853 SSL mistake] - Firefox 61, Safe Mode marked as solution, but that's a workaround, really, not a solution For reference: '''Cache and Cookies:''' When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site. (1) Clear Firefox's Cache See: [[How to clear the Firefox cache]] If you have a large hard drive, this might take a few minutes. (2) Remove the site's cookies (save any pending work first). While viewing a page on the site, try either: * right-click (on Mac Ctrl+click) a blank area of the page and choose View Page Info > Security > "Clear Cookies and Site Data" * (menu bar) Tools > Page Info > Security > "Clear Cookies and Site Data" * click the padlock or "i" icon in the address bar, then the ">" button, then More Information, and finally the "Clear Cookies and Site Data" button In the dialog that opens, you will see one or more matches to the current address so you can remove the site's cookies individually without affecting other sites. Then try reloading the page. Does that help? '''Testing in Firefox's Safe Mode:''' In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, and some other advanced features to help you assess whether these are causing the problem. ''If Firefox is not running:'' Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.) ''If Firefox is running:'' You can restart Firefox in Safe Mode using either: * "3-bar" menu button > "?" Help > Restart with Add-ons Disabled * (menu bar) Help menu > Restart with Add-ons Disabled and OK the restart. ''Both scenarios:'' A small dialog should appear. Click "Start in Safe Mode" (''not'' Refresh). Any improvement?