I use this ( http://hak5.org/forums/index.php?showtopic=6014 ) stand alone version of firefox along with PandoraRip. This way I can have my main FF browser updated with the latest and still rip with PandoraRip.
I start up stand alone Firefox
Close the Jar after it loads
In the stand alone FF i cancel the loading Jar page
then go to the regular pandora site and start the music.
Than I start up Pandora Rip
No problems rips every new file and skips already downloaded files.
This lets you have the latest firefox and flash