Book Burro - a book search extension for Firefox and Flock

About Book Burro: "Book Burro is an extension for Firefox and Flock. When it senses your are looking at a page that contains a book, it will overlay a small panel which when opened lists prices at online bookstores such as Amazon, Buy, Half (and many more) and whether the book is available at your library. ...Book Burro was originally created as a script for Greasemonkey, another extension, but has since grown to be an extension of its own (enabling a preference panel and caching). Besides adding functionality the switch makes installation easier."

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