best extension on chrome?

tampermonkey i guess.. lots of thing we can do with it

There are so many cool ones! If you're into productivity, I'd recommend "Grammarly" for writing or "LastPass" for managing passwords. For fun, "Honey" is great for finding deals while shopping online! What are you looking for in an extension?

there's this one extension called picture in picture - floating video, you can watch your yt vids on a floating window inside and outside your browser, game changer

as the others said, all the general adblockers, but also printfriendly is very useful for me since I print a lot of stuff in the office

of course ublock origin for the best adblock.