It’s weird, this is presented as new, but I had adblock on Firefox on Android from the start.

That and flash support were two of the major reasons for using Firefox on Android in the first place. This was back around 2010, when most porn sites still used flash players for video. Then flash died, that was fine. Then at some point Mozilla reduced the available extensions a lot, but at least some adblocker was still available.

Sadly, some APIs are still not implemented, so extensions interacting with bookmarks for example still won’t work…