Since it first appeared in 2007, LeechBlock has provided Internet users with a simple tool intended to increase productivity by blocking "those time-wasting sites that can suck the life out of your working day." With many customizable options, this Firefox browser extension allows users to select specific sites to block while leaving access to those that may be needed for school or work. It also tracks the total amount of time spent browsing websites within a specific block of time, a helpful feature for staying on top of your good and bad browsing habits. Interested users will want to explore this website before installing, which features Examples of various uses of the different settings, as well as a comprehensive FAQ section, and four-step Installation guide.