Comment 2 for bug 117909

Thank you for reporting.
Michel, flash plugin can be automatically installed by firefox. Just go to some website with flash content. You'll see a button "Install missing plugins" at the top right. Click on it, done ! If there is any problem still, report here itself again.

For the other questions, the best place to start for general help with Ubuntu or just to meet other Ubuntu users is #ubuntu or one of the many local language channels at irc.freenode.net
Please see http://www.ubuntu.com/support/community/chatirc for details.
Thank you.