I'm not using the https link. I'm explaining why the problem isn't at the user end, it's at the site end. If the site responds on https, then it needs to correctly include https:// links for the active content. There's nothing I can do at this end, other than downgrade to a less secure version of the browsers I have that will change the behaviour. I've already said before I disagree with the move towards https for everything but it's not something I can control. https://support.mozilla.org/en-US/kb/mixed-content-blocking-firefox https://developer.mozilla.org/en-US/docs/Web/Security/Mixed_content @alfbranch can mitigate his issue by finding out why he's loading the https version and revert to the http version. However, if the website responds on https (which it does) then it must respond correctly otherwise it's broken (which it is).