I am unable to login to my firewall/router. "I understand the Risks" is not fully functioning for me - 2nd Try

Let me try to explain the problem that I find with FireFox v36.0.4 one more time. I am running OSX 10.10.2. I am able to connect to the Internet successfully and all Internet functionality of the browser appears to be working without problems. However, when I attempt to connect to my router over my local area network via HTTPS I am unable to connect using v36.0.4 while v35.0.1 works just fine. My router is set to accept admin connections only via HTTPS, which is the configuration for the router that I want to keep in place. When I attempt to login to the router I receive the following messages: "This connection is Untrusted”. Firefox shows the following technical details: An error occurred during a connection to 192.168.X.Y. Peer's Certificate issuer is not recognized. (Error code: sec_error_unknown_issuer). I believe that there is a valid Juniper Certificate on the router. I attempt to bypass the problem by setting up an exception for the router. When I click on the "Add Exception" button, nothing happens... There is no text describing the problems of this site, and there is no button displayed to "Confirm Security Exception". v35.0.1 allowed me to establish an exception, v36.0.4 does not. I have tried many things including clearing the cache and cookies, reinstalling FireFox, etc. to no avail. I have followed other recommendations for other forum members and nothing works, is this just a bug, and will it ever get fixed?