"live streaming" ??
You mean like youtube?
I use Downloadhelper add-on for Firefox to DL Youtube type videos, mp3's, etc.
There are some situations where it won't DL certain audio/video. But for the most part works fine.https://addons.mozilla.org/en-US/firefox/addon/video-downloadhelper/
After installation, look for the red, yellow, blue balloons icon on your Firefox toolbar.
Navigate to the website where the Audio/Video is.
Click on the arrow next to the baloons.
If your media isn't available for download, it will be grayed out.
In the Downloadhelper preferences, you can select what type of media it will detect.
It isn't perfect, but it's a start.
Hope it works for you.
There is also something called RTMPexplorer at Videohelp.com.http://www.videohelp.com/tools/RTMPExplorer
Not sure if they are what your looking for.