uMatrix is an advanced browser extension that functions as a matrix-based firewall for web browsers, giving users fine-grained control over their browser's network connections. This document provides

introduction to uMatrix
https://deepwiki.com/gorhill/uMatrix

gorhill - uMatrix Wiki
https://github.com/gorhill/uMatrix/wiki

umatrix tutorial
https://www.electricmonk.nl/docs/umatrix_tutorial/umatrix_tutorial.html

UMatrix extension usage guide
https://www.wilderssecurity.com/threads/umatrix-extension-usage-guide.399299/

A uMatrix guide for Firefox
https://www.ghacks.net/2017/11/28/a-umatrix-guide-for-firefox/

Dashboard and Settings
https://deepwiki.com/gorhill/uMatrix/3.3-dashboard-and-settings

A uMatrix guide for Firefox

Umatrix is a content blocker and filter plugin for Firefox, Chrome and Opera. It gives the user fine-grained control over blocking and allowing of cookies, CSS, images, media, scripts, XHR, frames and other requests done by the browser. Think of it as a firewall for your browser. Effectively, it replaces cookie blockers, ad blockers and script blockers, as well as all privacy enhancing extensions such as Privacy Badger.

Because umatrix blocks everything by default, you always remain in control of exactly what each website is allowed to do. Many sites will of course break, but umatrix makes it easy to unblock things either by default or on a site-by-site basis.

Umatrix is an extremely powerful tool and unfortunately that means it comes with a bit of a learning curve. This tutorial tries to make that learning curve a little less steep.

UMatrix extension usage guide
https://www.dedoimedo.com/computers/umatrix-guide.html