can't unshade a window
 

How do I cancel the Shade after Shading a window? I Shaded it to see what would happen, and now can't cancel it, because every time I click on the window menu (in Firefox, clicking the globe in the upper left), the "windowshade" rolls up as soon as I move toward "Shade" to cancel it.

Hang on...never mind, I used the keyboard. But was the shading supposed to be irreversible by mouse like that?

(It would be nice in cases like these if I could delete my own posts, to save everyone's time and my dignity.)

I just double-click on the window title-bar to roll it up, then double-click to unroll.