Yes, uBlock Origin add-on is available in Firefox Android: https://addons.mozilla.org/en-GB/android/addon/ublock-origin/

Adblock Plus… I don’t know!

In adblock plus, acceptable ads are on by default, but optional:

https://helpcenter.getadblock.com/hc/en-us/articles/9738480686483-About-the-Acceptable-Ads-program-and-non-intrusive-ads

“Slightly worse?”… I haven’t touched abp in years, so I couldn’t say. However, here’s a comparison:

https://github.com/gorhill/uBlock/wiki/uBlock-vs.-ABP:-efficiency-compared

In Firefox, install the uBlock Origin extension. Go into ublock settings, disable ad blocking filterlists, enable tracking filterlists. Personally, I’m blocking ads too as they’re sometimes abused as malware vectors.

Or if you only want ads that aren’t interfering, there’s Adblock Plus with its acceptable ads programme. Can’t vouch for whether that’s a good or bad thing.