Apparently FirefoxOS is transitioning to a community project, better name (I always liked Boot2Gecko) and people are still working on it https://discourse.mozilla-community.org/c/b2g-os-participation
der.hans, uıɐɾ ʞ ʇɐɯɐs, Christopher Allan Webber, lostson and 1 others likes this.
Christopher Allan Webber shared this.
{probably unfair comment removed!}
(As clarity, it's good that Mozilla is willing to try things. I wish they would give projects longer to prove themselves though, it feels like a lot of pivoting. What has lasted aside from Firefox?)
Nonetheless, I hope the B2G community can make it happen! Good luck, all!