Some instances of Firefox recognize certificate as untrusted. Issue affects Firefox versions 40, 42, 43. Weird but on another PC running Firefox 42 everything works just fine. Notice that the same certificate is trusted by Google Chrome, MS Edge. My page is https://testoversip.avistar.com:10443/.
Yesterday (12/15/2015) certificate was trusted for all my PCs running different versions of Firefox.
See screenshots below:
Here is snapshot from Firefox which doesn’t rust to the certificate and one which trusts:
Did anybody face similar issue? If so - how to solve that?