It works perfectly, and even can make it so that you can't uninstall it or change the settings while the block is active. It's really helped me focus on my work better.

Easy to set up, works great, and helps my productivity!

I was looking into multiple firefox profiles for separate bookmarks (work vs personal/entertainment), but LeechBlock is much more simple and effective. The FAQ/examples are very helpful in setting custom time periods for the lockdowns as well.

Excellent add-on to keep me productive by supporting my self-diszipline! It is easy to administer and flexible to adapt to personal requirements. Great product.

A must have addons. Helps a lot to concentrate .

Excellent add-on. I've reduced my daytime (and some night-time) social media and news viewing significantly. This is a great tool to help you stay off the computer when you need to!

Life saver

This is what I was actually looking for

This is an really good app, it helps you to manage your time, without temptation for facebook or youtube etc...

Great extension!

Being able to limit my time on those wasteful websites like reddit or facebook has boosted my productivity to levels I would only have dreamed of. I do like the features like the override ability as well, as sometimes it is essential that I continue with my readings or the like. Simply incredible, one of the best productivity addons I am using now.

LeechBlock has really helped me avoid social media and concentrate on my work.

This is the most important addon available for Firefox. Thank you so much for updating it for FF57+ :) The fact that it keeps me sane on Android makes it even more amazing.

The Android version doesn't work with time limits, though. Just hard blocks. The timer sits at the maximum time and doesn't tick down.

Still a solid 5 stars <3

Great, but I wish I could get this on my phone too

Would be great with a time zone that matches my own! When I get the "page blocked" message, it seems set to British standard time while mine would be Central European time (British + 1 hour).

This thing has led to me being more productive at night to do homework. Every night I would drown myself in YouTube videos consistently and wait until the last minute to do my HW, but now it has forced me to do so and now I get stuff done quicker.

Excellent add-on, I recommend it to anyone trying to reclaim control over their time and attention.

I love how it's fully customizable, including:
- particular times of the day when a certain group of pages should be blocked
- how long each of them can be viewed (per day / hour / whatever you like)
- whether or not a site should be hidden from sight only when loading, or also while reading passively

It also displays a tiny timer indicating how much time you have left for today on Facebook or other distractions ;)

This extension is a nice improvement from the old (non-NG) version of the plugin, which already beat the competition hands down.

The addon is a webextension version of the Leechblock addon and helps me not wasting time (apart from writing a review when I should be studying ;-)).
You can block a list of domains or load a list of domains from an url. You can configure the day(s) of the week and the hours and minutes (eg. 0700-1700).
You can block yourself from undoing these settings and even disable the addon page of Firefox (be careful, you could lock it forever) to hinder yourself from disabling the addon.