uMatrix is a powerful browser extension that works like a firewall for your web browser. It lets you see and control every single thing a website tries to load, including scripts, trackers, cookies, and ads.
However, before diving into how it works, there is a major piece of news you should know: uMatrix is officially deprecated and is no longer maintained by its creator, Raymond Hill (who also created uBlock Origin). Because Google Chrome has transitioned to a new extension system called Manifest V2 to Manifest V3, older legacy extensions like uMatrix have stopped working on standard, up-to-date versions of Chrome.
If you are looking to master how the classic uMatrix matrix works—or if you want to use its modern successor—here is everything you need to know. How the uMatrix Grid Works
When you click on the uMatrix icon, it opens a visual grid (a matrix) showing exactly who is sending data to your computer. How to use uMatrix for Online Privacy
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