Firefox made a change to how URLs are displayed when visiting Web pages. Unfortunately, if you’re trying to find out if you’re on a secure connection by reading the protocol at the start of the URL, you can’t do that anymore. Here’s a quick fix for getting the protocol back in the address bar so you can see the full URL, every time: “
How to show the full URL in Firefox | How To – CNET
This solution does NOT apply to Androids.