I'm using Firefox v 3.6.3 and have just tried both Justin.tv and UStream.
In fact I watched the Stork Nest Live from Dumbravioara, Romania, Europe in Justin.tv,
I didn't try the channelsurfing.net site.
You don't say what happens when you get to these sites with the video feeds. Do you get a blank video placeholder, or error messages? Both the two I tried use Adobe's Flash Player 10, and my guess is that your Firefox Adobe Flash player is either disabled, or is no longer working.
You can check if the plugin is disabled by going to Firefox > Tools > Add-ons, then the Plugins tab. If it is enabled, then I would re-install Adobe.
To do that, I would first use Adobe's Flash Uninstaller tool to remove all traces of Flash, reboot the system, (just to make sure the registry is properly updated), then re-install Flash.
How to uninstall the Adobe Flash Player.
Install Adobe Flash Player - BEWARE, note the option to include "Free McAfee
Evening all, I was just wondering if people were having trouble playing back streaming video off of sites like Justin.tv, UStream, channelsurfing.net, etc. Seems a couple of weeks ago, around the time Firefox updated last, this feature stopped working. No Script, an add-on I've been using and love also updated close to the same time as well. I've used both programs with great success on these sites before except that now, even though neither of their settings have changed, I can't play back anything. I'm stuck using IE! Ugh! Now, 3 of my machines, all different makes and models, are having the exact same problem. I've included their specs here, but I really feel that it has something to do with Firefox and/or an add-on. Taking the No Script off, doesn't seem to help either. Any thoughts anyone?
Dell 9300 Inspiron, 1.6GHz, 2GB RAM, 60GB harddrive, ATI Mobility Radeon X300 video card, Windows XP SP3
Dell 8300 Dimension 2.6GHz HT, 3GB RAM, 120GB & 500GB harddrive, ATI Radeon 9800 video card, Windows XP SP3
HP Pavilion a230n 2.08GHz AMD, 512MB RAM, 60GB & 120GB harddrive, NIVIDA GeForce 4Mx video card, Windows XP SP3