The final push to start using Firefox over Chrome on Android might finally be thanks to the enormous selection of add-ons (Firefox's version of extensions) coming out next month. Chrome doesn't offer native support for extensions in its mobile app. Also, better security.
If treestyletabs worked on mobile that would work great. Just make the tabs bigger. Then again I think the UI is totally different on mobile so I feel the pain.
I have been using firefox on a phone since 2014 at least. I particularly like I can just go "send this tab to my PC" and it'll just be there without bothering with bookmarks, note apps, emails to myself or such.
I once had a text file on a VPS I would ssh on my phone to and paste links into. Blah.