OS X Lion can run in browser only mode http://www.macrumors.com/2011/06/12/mac-os-x-lion-can-run-in-chrome-os-like-browser-only-mode/
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
OS X Lion can run in browser only mode http://www.macrumors.com/2011/06/12/mac-os-x-lion-can-run-in-chrome-os-like-browser-only-mode/