Google wants world domination, also on the browser market. They lure you now with the Chrome for a Cause extension. Install this extension and open as many tabs as possible and Google will donate to one of the five causes you choose.
Everyone’s total tabs will determine a charitable donation made on behalf of the Chrome community, up to one million dollars. Here’s what your tabs can do:
10 tabs = 1 tree planted
10 tabs = 1 book published and donated
25 tabs = 1 vaccination treatment provided
100 tabs = 1 square foot of shelter built
200 tabs = 1 person’s clean water for a year
More at the Google Chrome Blog.