Today 10 years ago I went to Poland to buy a Phone with pre installed #Firefox OS on. The Phone was a Alcatel One, so very shitty. Two years later I installed Firefox OS on my Nexus 5 instead.
It was a very good concept, but sadly rolled out on too shitty hardware so it never caught on.
It's nostalgic for sure, but from a UX perspective I am so happy with the edge to edge displays.
My only gripe is that they work best with at least a little Bezel. Too little side bezel especially, and the edges of your palms will give you false input. Incredibly annoying.
The iPhones have been really good with this thankfully.
That being said, I fucking love my Galaxy S5. I miss the days of rooting and custom roms on practically every android device.