Different themes for different Firefox windows

I have multiple Firefox windows open on my Windows 10 system. If I choose a theme, every window shows the same theme. I want to colour each window differently so that, for example, all finance tags are on window red, all games tags are on window green, etc.Is that possible? If so, how?

Extensions or “dynamic themes” can choose to apply styles to a specific browser window. I couldn’t find an extension that allows you to do that in an arbitrary way, but it is possible.