Google has launched its own Google +1 chrome extension for Chrome browse for everyone to grab a piece of its features. This extension will enable you to view the current number of plus on the current page and also let you add plus to it. And with Google has posted how it doesn’t track your site visits or keeps a browser history for the purpose of using the Google Plus Extension here, You can read more about it at How the +1 button respects your privacy.
The extension will however keep some track of your visits for about two weeks to maintain and debug its systems. And it needs access to your Google + profile, IP address and some browser related information.
After you’ve installed the Google +1 Button extension to the chrome, the Google +1 button will appear on the top right corner with other extensions. Then you can start using the button on the pages you like.