Download: Chrome Web Store
I often find myself middle-clicking a link or otherwise opening links in ServiceNow in a "new tab" or "new window". This means that I often get pages that load just the content frame, without the ServiceNow frame.
The ServiceNow frame is the header and side-bar that facilitate easy navigation around ServiceNow, and easy access to various useful UI elements. When you open a link in ServiceNow in a new tab, you lose this frame. Your options to get back into the ServiceNow frame, are to either manually modify the URL by adding nav_to.do?uri=... to the URL after the domain, or to go back to your ServiceNow instance home page and start from scratch.
This tool allows you to click a button in your browser and immediately return the page you're on, to the ServiceNow frame.
It's that simple.