Chrome is installed by default on all Android devices that come from Google's partners as well as all Chromebook computers. That probably accounts to a lot of devices, without taking into consideration all the Chrome browsers that users choose to install on their PCs and Macs. So it's not hard to see how the browser could now be running on billions of phones and desktops and actively used on most of them.

Rahul Roy-Chowdhury, Chrome's VP Product Management at Google, tweeted today an interesting figure: there are 2 billion active Chrome browsers across mobile and desktop. Rahul doesn't explain what exactly constitutes an "active browser," and over which period of time it had to be used to count, but it's an important stat nonetheless.

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