Very useful! Has many options to suit practically every desired blocking conditions. The only big flaw for me is that on Android, it keeps counting the time when the screen is locked or when I don't use Firefox. This is due to Firefox not allowing add-ons to detect that. My workaround is to close the browser when I don't use it. It also saves battery.
I donated to the add-on developer.

the best one for people who just want to get their work done

Great extension, really helps me!

Works really well, a bit unclear on how the time budget (time limit during time block sets...) function but you can figure it out with some searches and careful reading of the configuration.

Fantastic extension!

The best extension for productivity!! If you want to improve your life then you need to install this extension

hey , I had a problematic bug.it comes from nowhere when I open browser.leechblock developer helped me by giving a universal name for it after I sent url.still have it somewhere in is ,but the add on works great! too bad I can't get it out of my os

Truly brilliant addon with all the functionalities you would need. Would LOVE to also have this as an app on my phone, which you can sync with my desktop!

Works really great, helps me focus a lot! :)

Very good apps

Excellent propose toutes options nécessaires et imaginables ! Par exemple je peux bloquer facebook.com sauf facebook.com/events ce qui me permet d'avoir encore accès aux évènements (notamment les anniversaires) sans me faire prendre par le fils d'actualité