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.

Leechblock behaves unexpectedly.
I created a block specifically for YouTube but then I wanted to modify the times. The modification remains in the options but the add-on's behaviour was NOT changed. So I decided to delete the YT block and start over. BUT EVEN DELETION DIDN'T ERASE IT! YouTube is still blocked even though it has been erased! The result is I have to disable the add-on completely to watch YouTube. Frustrating.

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

#include Owen Wilson's "Wow" meme

This is great and I really do appreciate the number of options. However, I would ask that you guys add the timer into the dropdown when you click on the addon tile in firefox so that it is easier to see at will. Also, please integrate the timer feature for lockdown as well. I use this feature more because I like to be fluid when I study, there is no apparent timer to show much time I have left. Its actually pretty annoying.

Good idea but it keeps deleting my blocking options/sets. Might have to do with Firefox Sync.

My recommendation to users is to keep a copy of the URLs you want to block etc in a text file so you don't have to come up with them again! Also, always check "Immediately block pages on these sites once blocking conditions are met", otherwise this add-on is useless.

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. :-)