Firefox rules. To see why firefox rules, follow these two steps:
Now you can start having fun. Possibly the coolest grasemonkey script is
Book Burro. When viewing a book on amazon.com, barnes and nobel, etc, Book Burro displays the price of the book from competing websites in a cool little floating window.
Last night, I hacked Book Burro to work with chapters.ca and amazon.ca, so now us Canadians can comparison shop with only a single tab open at once. Get it