I have Fedora 18, where I've installed flash and youtube.com works right. I cannot listen though to audio streams available via flash players, like soundcloud for example. Some do not load at all, with some I have an infinite "loading" status. I use firefox 20.0.
NOTE: I am a newbe to linux tweaking so please forgive me for incomplete information as I have no idea which one is cruicial here. Please do ask me further questions and I will keep on updating the question for relevant data.