>>i have this kind of problem some time ago.its due to AVAST antivirus (if your case)
>>-open Avast....parameters....active protection
>>-Click on customization web agents
>>-Uncheck "Allow HTTPS analyze"
>
>I am not using it.
>
>The issue was caused since a change recently that caused Firefox to remove the intermediate certificate. Once we installed it again, it worked.

The error code isn't particularly useful but to message made sense :-}