omg, the ultimate manager!

better than adblockers for blocking domains, files by extension or type, and better than having hosts files in system, the only inability which can be compensated with ublock is blocking specific elements and hiding them without blocking whole website or all files, has so much abilities and easy to backup lists, one of my best extensions!!! also gives perfect picture of websites and elements on it, useful for winhttrack, also useful because can make files and localhost work offline by blocking 3rd party for file and localhost

Not much needs to be said other than this is an absolutely amazing addon.

Top !!!

The best browser filter in the world. Period. Raymond you are a genius. Love from Rome, AndreaS

If you care about your web experience and privacy - this is must-have addon. At first, it seems complicated, but after little use you cannot imagine browsing without umatrix. Thanks Raymond for this magnificent addon.

uMatrix is fantastic. I had almost given up on FF, then switched to Quantum, fast as lighting at first then slowed down and increasingly broken with NoScript, which I disabled. Then FF was slowed down with scripts, slowing down my whole PC. uMatrix saved my PC!
Bit of a learning curve. Tip: if you don't know what item to unblock, right-click and "inspect element" is your new best friend. Also lots of tutorials on YouTube (probably the first site you'll partially unblock to see the videos). Was thinking about getting uBlock but I don't think I even need it now.