Ublock Origin is an obvious one, but I also can’t stand not having Foxy Gestures anymore. It adds customizable mouse gestures, so you can set it up to have easy swipes to go back a page, reload a page, close a tab, etc, and it feels wonderful and smooth to use compared to just using the traditional buttons to do everything. Honestly it’s kinda wild to me that this isn’t more popular now that people are so used to phone gestures. It’s good for the same reasons!
Bypass Paywalls Clean - It allows me to read articles on a huge number of sites without having to login or pay. I already have access to news sites I care about through legitimate means but for the sake of being able to quickly read something, this extension cannot be beat.