Puntuado con 4 de 5 estrellas

A very nice addon indeed.

I support kandilzade's request, to change the background color of the header when the message pane is selected. It would be helpful. I think it would also be nice if a way existed to customize the visibility of the buttons shown in the header (for instance, i hate the "junk" button and would like to remove it).

Thanks for the addon.

Esta valoración es de una versión anterior del complemento (2.0.6). 

The customization of the header toolbar is included in this addon (actually in Thunderbird itself):Place the mouse on top of the buttons, then click right mouse button, then "Customize". Then you can add/remove buttons.With the CompactHeader preferences dialog (e.g. also by the right mouse context menu on top of the header) you can choose the location of the header toolbar.

I added an option to the latest beta (2.0.7beta3) to darken the message header if the message pane has focus.