Some servers (very common on internal or development servers) rely on self-signed certificates. These are servers you trust but that don't have an externally purchased certificate. In other browsers it is very easy to add exceptions for those servers. For example Chrome follows very similar screens to Firefox's but they have an easy to use "Add Exception" button that Firefox lacks. I searched, but all the answers I could find seem to refer to older versions of Firefox whose menus don't match what I just downloaded. Questions: - Is the lack of that button a bug in the latest version of Firefox? - Or maybe there is an alternative way to mark specific self-signed certificates as trusted? - Or perhaps there is a plug-in that I can use to help me manage these certificates?