Strict tracking protection makes Firefox on Android a ton faster, especially on any website owned by Google or any link that has a Google wrapper (e.g. clicking a link on the Gmail app)
Strict protection on iOS was literally the difference between "I can use this phone" and "brick". I had an old iPhone, 6 Plus, and Safari lagged to death because it tried to load ads. Firefox didn't.
According to this GitHub discussion PrivacyBadger is pretty much redundant if you use uBlock Origin, can even hinder performance and cause opposite effect than expected.
To add to this, I have uBO installed on FF Android, but Strict Protection still makes things much faster for me. I'm not sure if it's because of my other Addons, but FF Android is so slow otherwise with certain sites (mostly just Google's)