Perfect if you want to have full control over your browser's queries, no data send to external servers.
Requires customization for most sites, worth it if you are already used to NoScript (I use this one now instead, allowing, by default, only 1st party content without scripts, which I enable manually). Once set up for your main sites not much of a hassle. Sometimes requires some experimenting to find out which content is actually required. Creates awareness.

Even though i have 56.0.2 installed it's still telling me that i'm using Firefox 50.0 and I need at least version 56.0a1, hence I can't install this addon.

This is a must-have extension enabling granular controls on what gets into your browser. It requires more interaction than uBlock Origin but the learning curve isn't steep at all.

The add-on is amazing! but there is a issue that I can't solve, the uMatrix is blocking the videos from hotmart.com (these videos are from vimeo), when I access my course, instead of viewing my course video I see "Sorry Because of its privacy settings, this video cannot be played here."

I allowed everything on this site in the uMatrix, changed everythinig to green, but no success too, I disabled the uMatrix for this site too, nothing changed.

If I go in Firefox Extensions and disable the uMatrix and reload the page the video loads with no problem, please when you have the time, can you take a look into this issue?

I wish you and all your familly, health, success and God bless everyone, have a very happy new year!

Please, sorry for my terrible english grammar.

Highly recommended !

Perfect bei richtiger Einstellung

Спасибо, Рэймонд Хилл!

Much better than NoScript, Does not break any site if you use a list.

A great addition to Ublock Origin if you are a power user who is concerned about your privacy and would like fine grained control over your web browser.

It takes some time to get used to it but its worth in the long run as things get easier after a few days of getting used to use the global & site specific scopes.

Этакая лайтовая замена связки noscript+блокировщика рекламмы, после обновления лисы до квантума, и кривизны нового носкрипта, самое оно.

Cant live without this addon, absolutely fantastic.

uMatrix is an excellent, effective alternative to the now completely useless noscript.

Yet another NoScript convert.

I'm glad FF Quantum broke NoScript and the new NoScript is such garbage, as it forced me to find uMatrix. With the pre-Quantum NoScript, it often devolved to "Temporarily allow all this page" until the page worked. Who knows what I was enabling?

The uMatrix interface seems intimidating at first, but after about 10 minutes I had it grokked. The granularity is great.

I do find that uMatrix behaves differently in FF vs Chrome, and I sometimes still have to resort to Chrome to get a page to display correctly. E.g. I use MicroCenter's web site a lot, and the reviews on there seem to come from bazaarvoice.com. uMatrix in FF shows only one element from bazaarvoice that can be enabled or disabled, while in Chrome it shows 20+. I can only get the reviews to display in Chrome.

Still, it's "vurry nize" and has allowed me to remain with FF (for the most part).

EDIT, following the dev's quick response:

Nothing to do with uMatrix, Privacy Badger was blocking bazaarvoice.com cookies. Once I allowed that, uMatrix in FF and Chrome were all nice and matchy. Thanks for the response.

I wouldn’t' recommend for the the casual user as it can be tedious unblocking scripts etc to get a site to work as expected.
However on the other hand if you're serious about cutting out the chuff that sites load and speeding up your web experience - or wanting a tool to block tracking scripts with granular control - this is what you need.
Excellent work.

Actually, this is the beat and very clead blocking tool.

I love it, but... Why needed for the new version to acces my downloads and others?