I love Chromium on Android, but not having uBlock origin makes me stick with Firefox (or Mull).
Firefox or Kiwi. These are your options for extensions
Firefox, barely. There are like 18 extensions unless you run Nightly and jump through a bunch of hoops.
I am puzzled that this situation has persisted for years now. It seems like Mozilla doesn’t really want extensions on mobile either.
I guess it is just not a popular feature on mobile. Most smartphone users don’t even know what a browser is, so ensuring addon support seems to be very low priority for Mozilla. Even a switch hidden somewhere in the about:config page in Firefix Nightly would be enough. These extension collections are the most user-hostile way of extension support possible. I just switched to Kiwi because of that mainly.
I think there are some Firefox forks with the entire extension store enabled, but I have not looked into this.
It’s incredibly difficult to get the non-mobile-approved extensions added to Firefox. I remember it took me a couple of hours to get it configured and I had to change my browser to the nightly version, which I did not want to do for stability reasons.
It was even more difficult to install “unsupported” browser extensions. I had to install a very old version of Fennec F-Droid, install the extension, then update to the most current version of Fennec to keep the extension. Through trial and error across several different Firefox versions, I probably wasted 3 hours getting it set up on my phone.
If you are not motivated and tech savvy (ish), the chances of getting a non-supported extension on Firefox are quite slim.