Got dual monitors? Have Firefox installed? Go ahead an open a browser window and then do this. Either click F11 or choose View > Full Screen (Command-Shift-F). Firefox then does something that Lion users have been clamoring for.
It creates a Lion-style full-screen presentation, complete with the double-arrowed OS X-standard restore button. And it does this only on one screen.
I'm dying to know how. All the other apps that support full-screen use the standard zoom item built into their windows.
