Rounds corners and adjusts appearance of textarea, select, button, and input fields. Resulting eye-candy is somewhat Safari-like. Applies globally, but you can exclude sites or apply it only to selected sites.

Add custom options to any select list with one click, or show the list items in a textarea for copying to the clipboard.

Display the availability of a book in the San Francisco Peninsula (CA, USA) Library System on amazon.com, other bookstores and wikipedia book pages