Out of curiosity, I clicked on "use itunes for internet playback" in iTunes. But now it seems that there's no "undo" button for that... So... how can I get my old setting back? I know there are tools called "RCDefaultApp" and MisFox to change the individual settings... but which settings/extensions/mime types do I need to change? Or can I just copy a configuration file from my time machine backup to some place to restore the settings to the previous state?