The reason I get any work done in these days when there are so much distractions.

This app saves me from wasting hours on social media EVERY SINGLE DAY! :)

This addon has saved me from youtube. I used to sit at my computer for hours watching youtube but now i can use my computer again without getting distracted.

Although the settings examples at the developer's website are very helpful, it would be nice if the website's FAQ was expanded to explain each line of the settings, because I didn't find the settings easy to figure out. But this is partly because Leechblock is such a powerful, flexible program. Customer support is great too. I'm very glad indeed that I found this program; it's just what I needed.

Does everything exactly as advertised. Wish it was available on Microsoft Edge as well.

#include Owen Wilson's "Wow" meme

Works really well, stays out of my way but allows for reasonable access to sites when necessary.

So far it does what it is supposed to do and keeps me focused on work

Oh, man, I remember when I had this add-on. It was almost life-saving. (If I were a more dramatic person, I would've said it was DEFINITELY life-saving.) I think I stopped having it after numerous Firefox update that made the version I used incompatible. I haven't felt the need to block certain sites again, thanks to the disciplined habit this add-on helped me build. But now, I'm slipping on the procrastination track, and no better time than to re-install this add-on.

The add-on is highly versatile and doesn't dictate you on how and when to use it. Multiple options make it highly customisable to your own needs, including multiple options of site-blocking groups (i.e., you don't have to worry about needing to access one site while it's being blocked together with another site -- put them in different group, activate them separately, and you're good), scheduled blocking time, ability to start blocking at any time you want, and the option to override the block if you desperately need to (personally not recommended to use unless it's a life or death situation).

If you're looking for a site blocker that's easly altered to your needs as well as easy to use, this is the one for you.

Excellent extension! I removed a star because of a bug I just found: it seems that if you use "blank page" instead of "default page" in the "how to block" section, the site is not actually blocked. Happy to give the star back when this is corrected.

Edit: I was not able to reproduce the bug, so I'm giving back the fifth star. :-)