A Bookmarklet is a bookmark for your browser that will not simply take you to a new site or page, but will perform JavaScript within the context of the current page. This opens up the potential for a LOT of powerful tools, tailored to your needs.

Taking a screenshot of what you can SEE on a web page is easy... what about capturing the entire page that scrolls down for multiple screens?

Do you need to see how your website stacks up in speed, SEO, accessibility and best practices? Chrome has a built-in report for that!

Your browser stores copies of pages you've viewed recently to make loading it again faster. Sometimes its necessary to delete that copy to get a fresh copy.