Incredibly powerful Rated 5 out of 5 stars

The ability to install simple scripts that can do just about anything with any web page or set of web pages, ranging from cosmetic fixes, to silly alterations, to adding features and repairing broken code, is an unbelievably powerful thing. And the fact that they can be installed in just a few seconds, without the overhead of whole add-ons and possibly having to restart the browser, is great too.

This review is for a previous version of the add-on (0.9.17).