Web developer tool - Chickenfoot
MIT & Google guys have built a Firefox extension that allows you to manipulate the webpage you are looking at. It enables you to write scipts, save a trigger for a specific URL and next time you go there, the script is triggered automatically. I loved the example about the Amazon bookstore where you can inject a link with the information about it’s availability in a library near you.
Check out the Google Tech Talk presentation.
Chickenfoot homepage.
