If you don't trust yourself enough not to waste time visiting games, video and social networking sites when you should be working, then LeechBlock could be what you need.Alternatively, LeechBlock could be used to stop you being constantly plagued by ads or messages from sites that you have no interest in. It could even be used by concerned parents to block kids from visiting certain sites in Firefox (although the developer does not advise using it for this purpose).
LeechBlock is a product developed by James Anderson. This site is not directly affiliated with James Anderson. All trademarks, registered trademarks, product names and company names or logos mentioned herein are the property of their respective owners.