Mozilla adds Security information to Firefox 37 Developer Tools
If you want to find out more about the security of a connection to a particular website or a request that a site made while it was loading, then it is quite difficult to do so right now in most browsers.
While you can look up protocol information if https is used with a click on the lock icon in the browser address bar, and go from there to retrieve additional information, it is taking quite some time to do so.
Mozilla added a new security panel to the Developer Tools of Firefox 37 that reveal those information and additional information in compact form. Firefox 37 means that it is currently available to Developer and Nightly versions of the web browser.