> I want my blue title bar on Windows, my menu bar, my status bar, my square tabs, etc, etc.
So like this [0]? The title bar isn't blue, but neither is any other title bar on Windows 10.
To achieve this on Nightly I opened the Customize view, switched the theme to "Light", checked the "Title bar" checkbox, and enabled "Menu bar" under the "Toolbars" dropdown. Tabs have squared edges by default.