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!
SingleFile ! Best method of keeping pages for offline use !
or u can save the page using the browser menu.
sometimes this allows for smaller size. and also ability to crop out unwanted resources. but then the page breaks and having a resource folder is messy to deal with.