It is maintained but the UI for dealing with JS is horribly time consuming and overly complex compared to uMatrix. I'll never really understood it and I keep using uMatrix on my laptop. I switched to NoScript on my phone. Maybe I can install uMatrix now if Mozilla really unblocked many extensions. If uMatrix stops working, I'll switch to NoScript everywhere for JS and uBO for all the other issues.
I've never used uMatrix what can uMatrix do what uBlock can't? I have set all sites to no js, and if something does not work I click the JS toggle in the menu, reload the page and thats it.
And yes uMatrix should work on Firefox on Android. ( At least it is installable)
uMatrix has a spreadsheet like matrix of features and sites. It's immediately clear what happens when I click a cell, a column or a row. With uBO I don't even understand where to click to toggle JS for one of the sites a page got scripts from. I learned it years ago but it was too cumbersome. I kept using uMatrix and I forgot it. I attempted to use it again now and I couldn't find anything. I didn't google for it.
I installed uMatrix on my phone and disabled NoScript. Of course I keep using uBO for filtering out ads and hiding annoying parts of sites with the element picker.
