Hi praado, how does Firefox describe the problem in the error page -- can you copy/paste the text of the message into a reply (here at https://support.mozilla.org/questions/1395670 - not by email). For example, if Firefox says the site can't be found, that could be a problem with the DNS lookup. This article describes how to switch DNS services: [[Firefox DNS-over-HTTPS]]. If Firefox says it couldn't make a secure connection, the page may list an error code similar to SEC_ERROR_SOMETHING (either in the main body or after clicking an Advanced button). This article describes the main codes: [[How to troubleshoot security error codes on secure websites]]. If Firefox says the connection timed out, or gives some other explanation, that would be a useful clue. Or if you get a completely blank page, etc.