I wrote the story behind Mozilla Hubs a few months ago for anyone wondering “Why is Mozilla working on this?”

https://medium.com/@gfodor/the-path-to-mozilla-hubs-2697e635...

Also here is a talk I gave on the reasons social VR is important to work on for anyone who cares about a healthy Internet:

https://www.youtube.com/watch?v=_5w8xbeCc2Q