This addon is based on the greasemonkey script "Wikipedia_v2." Because it is a simple script, it loads quickly and improves the readability of wikipedia articles. The end result is similar to those given by the "Grey Lady 3" addon for Opera.
It does 3 things(See screenshot)
1. Increases the font size
2. Changes the background to a pleasant shade of grey.
3. Removes the banners etc. from the top and removes the sidebars as well
Important: Hovering to the top of the page reveals a Wikipedia's topbar which otherwise remains autohidden and thus invisible.
I will soon convert more greasemonkey scripts into firefox addons. All my other purposes are covered by the addons in the following list.