An excellent replacement for StayFocusd (which is available only for Chromium). I would have rated it 5 stars, but I gave just 4 because it's missing one feature I want: remove the count-down timer from the add-on icon, and display it only on the page.

Perfect blocking extension, good UI and customization, lightweight but functional.

I highly recommend it

Serves the purpose what it is meant for . Few instructions are quite long otherwise good product to enjoy the service

Probably the best extension for Firefox

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This is the best website blocker for firefox!

I am a huge fan of this app and would recommend it to anyone

This extension really helps me keep me accountable to myself, and to not let my lizard brain dictate too much of my habits.

Best addon to combat social media addiction. Even when you can override it with a few clicks it really helps to reduce it.

Great experience. Multiple block sets help in choosing different combinations.