Created attachment 666191 [details] Firefox_TitleBar_Bug.png User Agent: Mozilla/5.0 (Windows NT 5.1; rv:15.0) Gecko/20100101 Firefox/15.0.1 Build ID: 20120905151427 Steps to reproduce: This is on: Windows XP Home Edition Version 2002 Service Pack 3 5.1 Build 2600 German language --- Change windows' Advanced Appearance on Windows XP: - "Active Title Bar" height to 18 px (German: "Titelleiste des aktiven Fensters") - "Inactive Title Bar" height to 18 px (German: "Titelleisten der inaktiven Fenster") - "Title Bar Buttons" height to 18 px (German: "Titelleistenschaltfläche") Actual results: Maximized Firefox 15.0.1 (as well as older versions) windows draw the title bar incorrectly. The tab button ignores the "Title Bar Buttons" height altogether. The title bar is as big as the browser tabs, but only the top part is actually drawn as the title bar. Expected results: Title bar should be drawn as big as the biggest element (here: browsing tabs). Tab grouping button should not ignore "Title Bar Buttons" height setting.
I have reproduced this bug. Windows XP Professional SP3 Firefox 24 The tab groups button does indeed size itself according to the height of the title bar, not the caption buttons. I am not entirely sure that this is a bug, however; I would not assume that the tab groupings button is supposed to be treated as a caption button.
Thank's Ian for commenting. Do you all still see this?
(In reply to Wayne Mery (:wsmwk, use Needinfo for questions) from comment #2) > Thank's Ian for commenting. > > Do you all still see this? This comment was 2 years ago, resolving as incomplete.