✨NEW✨ Sister Kbin community: https://fedia.io/m/firefox ⭐ r/Firefox is protesting Reddit, and is DOWN, but you can join our sister Kbin community. ⭐ Official Matrix room for the r/firefox community on reddit. The latest news and developments on Firefox and Mozilla, a global non-profit that strives to promote openness, innovation and opportunity on the web.

https://matrix.to/#/#reddit-firefox:mozilla.org

Firefox has a link that goes to their sister kbin community, but you don't see it until you click chat with us. So I don't think lot of people knew /r/firefox has gotten set up on the fediverse.