The BookButler for Firefox shows you how you can efficiently browse and stay up to date with the best offers from over 100 stores world wide. NOTE: The BookButler for Firefox add-on is cross-platform and it works on Windows, Linux and Mac OS.
Requirements: · Firefox 1.0 to 3.5.*
What`s New in This Release: [ read full changelog ] · Fixes errors on non en/de operating systems.