Microsoft Edge and other UWP apps have a full-screen mode which most people didn't know
A lot of regular Microsoft Edge users and Windows Insiders have been requesting a full-screen mode for the Edge browser since it was first introduced. Unlike other browsers (and non UWP apps) pressing F11 doesn't activate a full-screen mode in Edge. Microsoft have been aware of this request for a long time.
However, with no official word from Microsoft, it has come to light on Reddit that there is a full-screen mode in Microsoft Edge and other UWP apps. Just press Windows key + Shift + Enter.
Thanks to onmsft.com for the heads up!