What browser extensions do you use?

I'm using Chrome and currently I have:

AdBlocker Plus to block video ads, banners, pop-ups and other forms of intrusive and annoying advertising
Gmail Checker Plus to get notifications, read, listen to or delete emails without opening Gmail and easily manage multiple accounts
ColorZilla to get the color of any pixel on the page
Wappalyzer to explore tech stacks behind the websites
Lighthouse - an open-source, automated tool for improving the performance, quality, and correctness of your web apps
WhatFont to identify the fonts on the websites
JSON Formatter - beautiful and customizable JSON/JSONP highlighter
Bitwarden - a password management tool
OctoTree - to browse GitHub projects in a tree view
Momentum for new tab customization
Grammarly to reduce writing errors and get grammar suggestions
React Developer Tools to inspect rendered components in dev tools and record performance information
Redux DevTools for debugging application's state changes

What browser extensions do you use?