LeechBlock 0.3.5.1

Firefox extension that will block those time-wasting sites that can suck the life out of your working day
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, Hash Pot, Sticky Media, and the like.)
All you need to do is specify which sites to block, between which time periods, and on which days of the week. You can easily specify up to four sets of websites or domains to block, with different times and days for each set. You can even set a password for access to the extension options, just to slow you down in moments of weakness!
System requirements:
- Firefox 1.5 - 2.0.0.*