RSFind! is a firefox extension that comes to make your life easy, if you are one of Rapidshare (or other hosting services) maniacs.
RSFind! can find links to files on hosting services (e.g. rapidshare) that appear in the currently visiting webpage(s). It gives you the capability to select the files you want and manage them altogether. Currently implemented magamements are copying them to cpipboard and opening them in tabs.
Note that you can pass the links to a Download Manager (like USDownloader) by using the copy to clipboard function (it is required that the Download Manager has a clipboad-watching function).