I have two websites of my own. I am viewing one and it is correct. When I view the other, it uses the https cert from the first one, and says my site is not secure. I have viewed the cert, and it is definitely correct. I think Mozilla is probably caching old information - the certs have been correct for most of 2025, so it is a pretty old version. Therefore, it is not actually caching the cert, but caching which cert it should use. I have tried clearing the cache, and it did not help!

Has Mozilla got some kind of cache I can't clear? Should it not re-read the cert when it loads the site, or at least the cert date, each time it reads the site (ie was not previously showing it on screen)?