The only feature I hope for is "hit tab to search" after typing a domain name in the search bar. For example in Chrome I can type "youtube.com" and then hit tab, and then type in a search query.
The most underrated and undermarketed to the average user Firefox feature.
It's nice, clean, simple and nowhere near as "bloaty" (for lack of a better word) as normal FF on android. I use it as my default browser on my phone, but (for some reason) every now and again it dumps articles I leave open and then I am no longer able to find and read them :/
 I have a feeling it happens after every update.