In Firefox for OS X, when I go to "File" -> "Page Setup" or "File" -> "Print" and make changes the next time I click on the "File" menu the "Close", "Save Page As", "Send Link", "Page Setup", and "Print" options are grayed out. How I can print or access the other options without closing and re-opening Firefox?

This is an issue known to exist in early versions of Firefox 3 for OS X. This problem may exist in other versions. The work-around is to click somewhere in the Finder (for example, on the desktop) and then return focus by clicking back in the Firefox window. This should re-enable these options from the "File" menu.