External chat window is not invisible on Windows

[Massimiliano Mirra]

On Linux, setting width/height to (0, 0) is enough to make the pre-opened external chat window invisible. On Windows, a tiny windows is still shown.

[Massimiliano Mirra (bard-hyperstruct)]

Songbird uses a binary component, songbirdnest.com/Songbird/WindowCloak;1, to cloak/uncloak windows. Comment at the beginning of http://bugzilla.songbirdnest.com/show_bug.cgi?id=1822 seems to suggest that it's possible to do the same with just Gecko.

It it turns out to not be possible, just open window and minimize it to taskbar instead of resizing it to zero.