Tried to use Mozilla's extension installer for running flash plugin installation, and now all flash scripts are showing a big gray play button and won't run.
Should I just uninstall the plugin and install flash by itself?
You can install it with '
sudo apt-get install flashplugin-nonfree
I've never had much success with installing flash plugins or downloading and installing flash from the Adobe site.
Eventually, though, I discovered a web site which described what do immediately after installing Ubuntu. At the time I was using 8.04 LTS
The procedure involved defining a better set of repositories, so that the apt-get update approach worked, and I can watch flash movies.
this link is one I just found for 9.04 (not the one I used back in 2007, or something)
The key seemed to be the first step: