A lifesaver! Had already procrastinated my whole day on this paper. Thanks to LeechBlock I didn't also procrastinate through the night. It's great as a small little reminder to get back to work when opening up Facebook's become so instinctual. I'm glad this addon made it through the switch to WebExtensions.

Would be nice to have a quick toggle for turning on/off different block sets rather than disabling the extension or messing with the when-to-block time period/limit logic.