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.
So development was abandoned, whatever happened with the Ubuntu OS for cell phones?
It still exists but only officially supports google nexus and some niche phones. I don’t think it’s going anywhere but I do hope to be wrong someday. At the moment there are options like GrapheneOS to run Android without letting Google into all your shit by default.