I have read complaints here about message TEXT being double spaced, but I am asking about how to reduce the double spaced HEADERS that take up too much space along with the tabs for Reply, Archive, Delete, etc.

I have been using TB for a very long time but recently after several upgrades I see that the Message pane Header is double spaced. I use Layout settings: Classic View/Folder Panes/Folder Pane Columns/Message Pane I have read complaints here about message TEXT being double spaced, but I am asking about how to reduce the double spaced HEADERS that take up too much space along with the tabs for Reply, Archive, Delete, etc. Also, when I try to use the Bold setting in this "How Can We Help" box, all I get is double quotes. Is this a bug, or a Firefox browser issue?