uMatrix is also available on Chromium-based browsers and therefore it works on Brave too: https://chrome.google.com/webstore/detail/umatrix/ogfcmafjalglgifnmanfmnieipoejdcf

I've still installed Brave on my system, but I do mainly use Firefox currently. The main reason for that is that scrolling with my mouse wheel does not work for me (very slow). If there would be an option to be able to change the scroll speed, I would use Brave way more often and maybe even as main browser.