アドオン

Red John Smiley_X01

For Firefox Version 19.0

In my browser only works:
Header in px: 1366 x 107
Footer in px: 1366 x 46
So I rescaled it to 2553 x 200 (Header) and 2970 x 100 (Footer).
And it still works but when I create a new persona with the same porportion it don't work anymore.

Note:
Download PixelRuler (Freeware) to create your own optimal persona.
It helped me to find out the optimal width and height for my browser.

FYI: You're right, english is not my first language.