This is a Chrome extension that reminds you to take rest and perform eye exercises, after each 20 minutes. It uses the 20-20-20 rule for eyes. As per this rule, Every 20 minutes, take your eyes off your computer and look at something 20 feet away for at least 20 seconds.
It is a browser add-on which lets you search via your favorite search engine
The WOT add-on is a crowd-sourced enhancement to your browser protection
