Chrome for Android’s sandbox technology helps ensure malicious mobile websites are contained and do not impact the entire browser. This more in-depth sandboxing capability will be automatically used for devices with Android 4.0, Ice Cream Sandwich and up. The update will also fix a number of bugs and is available to users with 4.1, Jellybean.1 and 4.2 versions of the Chrome browser. We hope you enjoy this update and continue to enjoy the speed and simplicity that Chrome is known for wherever you go.”]
Source: https://chrome.googleblog.com/2012/09/chrome-for-android-just-got-safer.html