As mentioned by a few other reviews, a Firefox update caused the extension to not work in private mode. The extension was updated in under a week to resolve the issue. Works well, active bug fixes, open source. Highly recommend.

very good tool to add additional security to your browser

The new update stopped allowing this extension to run in private mode. please fix, otherwise than this I give it 5 stars.

Simple and useful, but a few days ago, it stopped working in private windows. 5 star if this issue is fixed. (edit, this issue has been fixed)

вполне неплохо работает

it's great! When it works. At first, I was wondering if it was my regexp that was the issue; I tried to block sites without regex and... it still didn't work. However, sometimes it does work?? It's very strange and I wish I knew what caused this so that I could talk about it on GitHub...

Just installed and so far so good. Just what I needed.
Then I checked some negative reviews in this page and I couldn't verify that those guys maybe have some virus in their computers. Any way, I will continue using it and will post if something goes wrong.

Does what it needs to do.

Excellent. Thanks a lot Ray, nice extension.

This Firefox add-on is pretty good! Ignore those people who are saying, "It doesn't work." I used this Add-on on Firefox so I could fasten. I promised that I would quit YouTube until Lent is finished. So this really helped me keep my promise!

Very good extension previously but now no longer works.

Used to be amazing but recently stopped working

Much more simplier UI, than other blockers. Really nice, helpful.