Between December 15th and 19th, Google will donate a small amount of money to a charity of your cause for every tab you open in Google Chrome, called “Chrome for a Cause”. You have to install the Chrome For a Cause extension, and at the end of every day you can choose a charity to donate your opened tabs to. Chrome For a Cause supports the following charities:

I’ve only accumulated 2 opened tabs so far, but I’ll let you know what happens to my tabs… 🙂