[pabs3]

The Boot 2 Gecko OS was the community-developed successor of FirefoxOS and KaiOS is the commercial proprietary fork of B2G but unfortunately B2G is no longer maintained:

https://en.wikipedia.org/wiki/B2G_OS https://en.wikipedia.org/wiki/KaiOS

[pusheenomics]

At least KaiOS is very successful but it’s weird that it’s proprietary.