Uses Firefox's addon privacy APIs very nicely - it restricts its access to just the sites you specify.

This app is exactly what I need but I want to be able to allow specific subdomains if possible. Like block youtube.com but allow music.youtube.com?

Thanks for the prompt reply, 5 stars without a doubt.

Excellent for productivity. Only need a feature to enable subdomain or subsection ( eg: reddit.com/r/investments ) of website.

One of these rare pieces of software where elements have been designed carefully and thoughfully.

Excellent -- have helped me re-focused multiple times since using it less than a day!

I was using LeechBlock before but the way it works doesn't suit me -- to the point that I disabled it on my main browser. If you don't have much luck on LeechBlock, I suggest you give this a try!

Always felt like there was still a room for innovation in browser time tracking space, and I think you nailed it! Great design, just works, and everything I could have hoped for. Well done!

I've been looking for an extension like this for a bit. So far -- this looks great, it works great, thanks for the awesome work.

Oh god is this a perfectly user centered tool! Every single step of installing this plugin has made me happy.
- That it only gets the rights it needs
- The clear and simple design
- The instructions to set it up so that it is maximally useful

I have never been in love with a software at first sight. Until now.

Dead simple and easy to use.

Excellent add-on that helps block out unwanted sites. A pop-up window gives you the option of visiting the site for a short time if you really need to. If you consistently avoid the unwanted sites, you can build a streak and keep your momentum going. Developer is responsive to feedback. Highly recommended!