Currently, you can serve with every new tab you open in the Google Chrome browser a good cause. All you have to do is to go here and install the Chrome extension.

Once installed, every new tab you open will be counted. In the end of the day you can chose 1 out of 5 organizations Google will donate to. Médecins Sans FrontièresThe Nature Conservancy, charity:water, Un Techo para mi País, and Room to Read

Limitations: only until 19th December. 250 tabs a day. Google will donate a maximum of 1,000,000 $.

Yesterday, I opened only 124 new tabs. This equals the following contributions:

So with 250 tabs it seems you can chose between: 10 vaccinations, 25 books, 1 person’s clean water, 2 m² of shelter or 25 trees.

Chrome installs really fast, so consider switching just for the remaining 1,5 days to switch.