<![endif] Menu Skip to content Home Installation Examples FAQ Support Version History Search for: #site-navigation #navbar #masthead .entry-header LeechBlock is a simple productivity tool: an extension for the Firefox web browser designed to block those time-wasting sites that can suck the life out of your working day. (You know: the ones that rhyme with ‘Blue Cube’, ‘Space Hook’, ‘Sticky Media’, ‘Quitter’, and the like.) All you need to do is specify which sites to block and when to block them. You can specify up to six sets of sites to block, with different times and days for each set. You can block sites within fixed time periods (e.g., between 9am and 5pm), after a time limit (e.g., 10 minutes in every hour), or with a combination of time periods and time limit (e.g., 10 minutes in every hour between 9am and 5pm). With the lockdown feature, you can ...