I've been exclusively using Firefox as my main browser for the past 8 years or something, but I'm gonna try out a month of using Edge to see if I like it more.
The reason I wanna try it is because I really love the sidebar that opens up apps and websites in a side by side view as a widget! It's excellent for quickly accessing my todo list, calendar or RSS reader
I'm well aware of the privacy implications of using Edge, but it seems like a solid browser
I honestly don't get it when people (who have most likely never used Firefox) say that it's a bad browser because it's slow.
They reach this conclusion solely based benchmarking numbers. From my experience with Edge for the past 6-7 days, Edge is either the same or feels SLOWER than Firefox in regular use. Especially on Android. I didn't realize how good I had it with Firefox on mobile until I tried Edge 
Still loving the sidebar though, but I'm starting to miss Firefox a bit. Could just be home sick, so the experiment continues!