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.
I also had a Sailfish phone, but someone broke into my appartment and stole it together with other electeonic devices. I alwaydös wanted to know what happened when they tried to sell it :D