This extension provides a simple interface where you can write regular expressions against a web page and use them to retrieve data from it. It tells you how many times it matches, and provides the data in an HTML table that makes it easy to copy and paste into a text editor or spreadsheet application. A few of the reviews were upset that the popup didn't persist your regexes and whatnot. After using it awhile myself, I saw how irritating this can be. Now you can safely click away, and when you open the extension once more, all your code and data will still be there waiting for you. For those of you who need it, you'll know exactly what I'm talking about. And for those who have no idea, you want to go download Angry Birds. Why are they so angry?