>>809103Truly top-tier bait-shilling, thank you.
>>809059>>809155Ghostery is run by an ad company and makes revenue from tracking users. Do not use it.
>>809053AdBlock Plus is a for-profit company that makes revenue off an extortion racket. Do not use it.
>>808755>Video DownloaderI would recommend adding youtube-dl to your path, using a config file for any settings you may want (like storage location) and then just using [code:lit]youtube-dl 'URL'[/code:lit] on the command line.
>>808704Others have already mentioned many good ones. The main one you need is uBlock Origin. To save space I'll just throw screenshot most of mine (see pic), and for those not shown it's Stylus (NOT Stylish, which was tracking users), Tabliss, Terms Of Service; Didn't Read, Transparent Standalone Images, True Sight, uGet Integration (if you use it), uMatrix, Unpaywall, Violentmonkey (Greasemonkey is an alternative), Yomichan, Zotero Connector (if you use it), Wappalyzer, and SalaDict (best translation tool I've found thus far). There's also your choice between HTTP-Z, Smart HTTPS, and HTTPS-Everywhere.
(You can ignore Nook, it's just a music thing I was fiddling with)
Obviously a lot of mine are cosmetic (Stylus, Tabliss), and others are security/privacy related. Just skim through and grab the privacy/security ones, and try out the cosmetic ones to see if you want/like them.
