Install Fennec using F-Droid, it's firefox with more extensions than what firefox for android allows. Are they ever going to re-enable other extensions on firefox android? Firefox used to be synonymous with "awesome list of helpful extensions".
I've had the opposite experience, switched to Firefox on Android after the new update because of the better performance and UI. Limited extension support is annoying, but if you get it from F-Droid or use the nightly version, you can enable a hidden setting that lets you install any extension you like.