Here is a link to the plug-in.
https://addons.mozilla.org/en-US/firefox/addon/44...

Michael,

I found something today that helps keep the mindless surfing on the internet to a minimum and only at predetermined times of day. It especially works well for people who do business over the internet (like myself).

It's called LeechBlock and it's a plugin for Firefox (sorry Safari and IE users). Basically it is a "simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them."

Not quite sure why they named it LeechBlock. Something like Net Nanny would seem to be more intuitive.