We have a reported issue with Android on tab creation certainly.
Given that I don’t think we have tests for the Firefox parts for Android and we also don’t have indicators for the containers in Android Firefox too I wouldn’t for the short term at least expect it to work.
It’s on my backlog to work through where we are with this support at some point however we don’t have a UI idea for how containers would work on mobile yet either. (we have had discussion about it however nothing more than that)
Given all of this, I might actually suggest that we prevent Android installs of anything with “contextualIdentities” until we have a bigger picture.
We certainly want this to work however given users broken experiences on an already complex concept isn’t a great idea.