I received an error message while opening a url with rtsp protocol
Solution is simple. We recommend adjusting the Firefox configuration settings by adding an entry for the RTSP protocol:
1. Open Firefox, and type about:config in the URL bar.
2. Right click in the main window and select New and then String.
3. Enter network.protocol-handler.app.rtsp for the preference name and click OK.
4. Enter /usr/local/RealPlayer/realplay and click OK.
Thanks a lot.