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.
Same, having competitors to Android and iOS would be great.
The are some alternatives out there. Calling them competitive might be a stretch though.
There’s a Linux phone, but I’ve heard it is a beautiful mess.