Comment 28 for bug 485224

Frederic: Can you confirm that you're running firefox on linux -- and would you happen to be saving to a mounted drive that has the executable bit incorrectly set? (Or perhaps your umask has things created with executable set.)

biesi: If we can't grab the primary extension, we should probably still try putting on some extension to prevent the user from accidentally creating an executable? E.g., saving a .torrent file as .exe. But then what extension should we use if we couldn't get the primary extension? Take the source's?

And I suppose we could make this Windows only for bug 270159.