NoScript breaks some sites but makes many run faster. Everything defaults to blocked, but I've marked some known ad servers and Google/Facebook trackers as specifically blocked so I don't accidentally unblock them.

Also, setting up custom searches is very nice: when editing a bookmark, attach a keyword to it and put "%s" in the URL. If you type the keyword first, the rest of the search string will replace the %s. I use it for the usual Wikipedia search, but also I've set "@r tf2" to take me directly to the subreddit called tf2, and @i immediately throws the query at DDG's image search.

My personal basics are Adnauseaum (uBlock origin based, makes exceptions for non-tracking ads, and clicks all tracking ones to pollute data), Decentraleyes, HTTPS Everywhere, and multi-touch zoom if I'm on a 2-in-1

Firefox on mobile. uBlock Origin on mobile.

* Multi-Account Containers

* Temporary Containers (works with Multi-Account Containers)

* Cookie AutoDelete