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!
Those were dark days. I also tried using Jdownloader! 😂
The other day I found in a backed up zip a bunch of old settings from those days. I used one which I guess was called “Password Manager” judging from the filenames. Before browsers took care of that. 👴🏻