On 21.05.2014, Mickey wrote:
I have had problems of Firefox freezes while playing streaming video
and
locking up computer.
Ok.
If this is not what you already did: uninstall the flash plugin,
download the .tar.gz archive of the appropriate plugin here:
http://get.adobe.com/flashplayer/
and copy the file "libflashplayer.so" from the archive to ~/.mozilla/plugins.
Restart firefox and try one of the videos which didn't work before.
Does this help?