Take data from one page and move it to another.
Use jQuery to take data from one page and access that data on another.
When clicking the extension, store the URL and page title of the page you were on. Then, a new window will popup based on the URL specified in the extension options. In this case, the page has a form on it. We can take the data from the original page and inject it into the form fields using jQuery.
The possibilities are limitless: whatever you can do in jQuery, you can do in the extension.