Ask HN: Which Chrome Extensions Do You Use?

Out of curiosity, which chrome extensions do you use? Please consider listing all that you currently have installed in descending order of importance to you. If you have any newbie (or advanced) tips for a particular extension, please do share!

Here are mine, in descending order of importance:

Video Speed Controller - changes the speed of (almost) any video; press 'd' to speedup 0.25 speed ('s' for the opposite) and 'r' to reset back to 1.0 speed

uBlock Origin - lets me permanently block specific page elements - it brings me joy to block the 'trending' and 'news' tabs, google doodles and any other trendy/ing elements. My 'filter' list is only 100 lines long; mostly youtube, twitter, and stack overflow.

SponsorBlock for Youtube: crowdsources the timestamps for self-promotion and product placement in youtube videos and automatically skips them for you

Duplicate Tab Shortcut: gives keybindings to open the current url in an adjacent tab (rather than at the end of the tab bar).

Others (I don't consider these essential):

SelectorGadget, Pushbullet, JSONVue, Google Docs Offline