Ubuntu 9.10 x64 + Firefox + Flash high CPU usage

How to reduce CPU usage (at least) when using Flash based applications in Firefox

 

Instructions:

 

1. check your firefox version (mine =  firefox-3.6.5pre)
2. sudo gedit /usr/lib/firefox-3.6.5pre/firefox.sh
3. append the following to the end, save and re-run firefox

                      export XLIB_SKIP_ARGB_VISUALS=1