Fixed Background Remover - GreaseMonkey UserScript
Fixed Background Remover UserScript disables fixed background anywhere in the page. Changes all fixed background images to normal background image(scrolls with the page).
The reason for creating this scirpt is specified in the 'Slow Scrolling in Firefox in Pages With Fixed Backgrounds' post.

Comments
I'm not sure which one came first, but my one does more.
a, strong, em, b, i, code, pre, pandbrallowed. Other tags will be shown as code(< will become <). Urls, Line breaks will be auto-formated.