Comment 20 for bug 1871644

(In reply to Martin Stránský [:stransky] (ni? me) from comment #11)
> Emilio, how is the best way how to do it? We can introduce a new appearance (-moz-window-titlebar-alpha for instance) which contains only alpha component from titlebar and paint it over theme color or use existing one (-moz-window-titlebar) but I'm not very experienced in js/css styling so I'll appreciate any help here.

I don't think that's super-great, I think I have an idea which should be relatively simple, stealing.