> I _am_ curious about the motivation behind Firefox Focus though. I use vanilla Firefox on Android and really enjoy it.. what was the motivation for using a Webkit base for Focus? Seems like the stripped down, privacy focused experience would have worked fine based on Firefox proper?

I'm pretty sure the answer is quite simple, which is that the Gecko embedding story has been diabolical for a long time (i.e., it's hard to put Gecko in a new product), whereas the majority of WebKit ports and Chromium (through its Embedding Framework, or to a somewhat lesser extent its Content API) are designed to be easily embedded in new applications.

AIUI, the fact this led to this ridiculous situation is part of the reason for the renewed interest in embedding Gecko (and the emergence of GeckoView).