Comment 76 for bug 1347305

This looks already promising.

I think -moz-mac-vibrancy-light is mostly used on sidebars, or not? It makes the header part again different from content, which isn't the goal of this bug. I think first we should do it without vibrancy.

Here some feedback:

- The header background color should be picked from the defined content background color. This can be set in Preferences/Display/Formatting/Colors.../Background (editor.background_color). Else when a user changes this color the header would differ in his background color. And unfortunately in HTML compose mode, msgcompose.background_color needs to be checked. But this could be a different kind because the user can change this color during editing, and should we then also change the header background color?

- The aw-menulist is lacking a hint to be a menulist. A dropdown arrow on the left should be shown as a minimum.

- The msgIdentity dropmarker is so far away on the right from the address. What about including the From: label into the menulist and move the dropmarker to the left directly above the aw-menulist dropmarker?

The two last notes can be reverted with bug 440377.

A tip: For selecting the text/border colors in the header you could also use the toolbar[brighttext] ... selector to switch between dark and light colors. Actually it's only used on Windows but it is working on all platforms.