Firefox 68 user here. Leechblock rating reduced to 3 stars; stops working, does not block URLs reliably. This used to be a stable and VERY useful extension, but now (Sep 2019) it stops working altogethter every few weeks (fails to block any of my specified URLs). Removing the extension and re-installing sometimes fixes the issue, but only temporarily. Hopefully a future extension or Firefox update will fix the bug causing LeechBlock to suddenly stop working entirely.

Great Addon that helps me stay productive. Tons of features so you can finetune your own internet usage.

A free essential to help focus on studies, LeechBlock is just great!

veramente potente. forse fin troppo

Un bloqueur de sites complet avec option de verrouillage pour nous empêcher : de désactiver le blocage de sites, nous dissuader en nous obligeant à recopier un long mot de passe complexe. Si vous êtes étudiant et que vous cherchez un outil pour discipliner votre temps passé en ligne : c'est du tout bon.

It is wonderful

Excellent addon to block websites.

Works with no problems. And if you frequently have a temptation to remove the block and access those websites that you in fact should'nt, then I recommend to use the advanced options. Although nothing is impossible, the advanced options makes it difficult to unblock.

I started using LeechBlock a month or two ago and it has already saved me many hours by helping me kick some time-wasting habits. I never realized how compulsively I'd enter certain URL's whenever I felt bored or distracted.

Works amazing, but it's too easy to just turn off the add-on :<

Love it, especially for the fact that it works on mobile.