This is an offshoot of Google Chrome's multi-process nature which allows each tab to run separate from the other. This allows you to manage, reload or shut down each tab without affecting the rest of your browsing. All this can be done through the Task Manager. Press 'Shift+Escape' to start the task manager. An unresponsive tab can be shut down without bringing down the browser by a simple press of the 'End Process' button.