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.
Imo that's what caused Firefox to lose market share to Chrome. They focused too much on Firefox OS and deprioritized browser development. In one example, it took them a long time to implement FIDO when it was already functional in Chrome.
Considering how dominant the mobile OS has become, this wasn’t a terrible gamble. Like they lost and it looks bad in hindsight, but you can’t blame them for trying. If it had succeeded, we’d be living in a very different world of technology right now.