What are your favourite extensions?

I really enjoy Firefox on Android as I can install a bunch of extensions and I find those extensions game changer, especially on the mobile.

One of my favorites are

• Libredirect - literally one of my favorite ones. Redirects popular sites to privacy focused frontends, like YouTube to Invidious, etc.
• uBlock Origin - I guess everyone knows this one
• Privacy Badger - blocks trackers
• Ghostery - blocks trackers, ads, scripts, etc.

What extensions do you guys use?