You have installed LASER CAT and now you can shoot lasers at things!
STEP 1: Click the LASER CAT button in your browser toolbar.
STEP 2: Click things on the page, behold the power of lasers!
STEP 3: Click the LASER CAT button again to dismiss the cat.
IMPORTANT NOTE: Due to important security restrictions, LASER CAT does not work on some web sites (like the browser extension store, gmail, etc).