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.
IDK, I still like them. Definitely still managing not be evil. And keep in mind they are competing with multi-billion $ corporations that pretty much control how the web works today. Google (and others of course) first turned the web into ad funded business and then used their huge ad revenue to build a really good browser and promoted it using shady practices. What was Mozilla supposed to do? Sometimes simply having better software is not enough.