https://addons.mozilla.org/en-GB/firefox/addon/libraryextension/ https://addons.mozilla.org/en-GB/firefox/addon/libraryextens... Automatically queries librarie

https://addons.mozilla.org/en-GB/firefox/addon/libraryextension/ https://addons.mozilla.org/en-GB/firefox/addon/libraryextens... Automatically queries libraries for book availability and displays the info online on Amazon (and similar) pages.