Firedoodle is a Firefox extension that adds white board functionality to any website. Firedoodle is extremely versatile. Check out the description below and the Youtube video explaining and demonstrating how to use Firedoodle.

When you install Firedoodle, you add a whiteboard to every web page you visit using the Firefox Browser. This is great for reviews, jotting ideas, or just goofing off. You can also mark your place on looooong pages so if you need to leave and come back, you can easily pick up where you left off. It’s easy to use and you can even save your highlights or placemarks if you register so they don’t disappear when you close Firefox. You can find help here covering everything the add-on can do, or keep track of development on my personal blog.

Turn the web into a whiteboard!
 – [Firedoodle]