I recently started using Amazon's Cloud Player. In order to keep playing songs, the player's webpage has to remain open. However, I have the habit that when I am finished with a browsing session I go ahead and close Firefox. However, this closes the player's webpage, which stops my music from playing.

Hence, I'm wondering if there is a way to prevent Firefox from closing if certain tabs are open. For instance, the title for the cloud player's tab is "Amazon Cloud Player". It would be great if when I try to close Fireofx, it prevents me from doing so if a tab with the title "Amazon Cloud Player" is currently open. If I wanted to close the browser, I would need to close the tab first.