There is a new revision of this tutorial available for Ubuntu 14.10 (Utopic Unicorn).
The Perfect Desktop - Ubuntu 7.04 Feisty Fawn - Page 7
11 Flash Player
To see if the Flash plugin (which we installed with Automatix before) is working, start Firefox. Then type about:plugins in the address bar. Firefox will then list all installed plugins, and it should list the Flash Player (version 9.0r31 which is the newest one at the time of this writing) among them:
You can now open a web site of which you know that it uses Flash. For example, www.spiegel.de has video news in Flash. You should be able to see (and hear) the Flash movies:
Another web site that uses Flash movies is YouTube, for example.
12 Inventory (III)
Browse the Applications menu again and check what you've got installed so far.
Your list should look like this now:
[x] The GIMP
[x] Flash Player
[x] Google Earth
[x] Xchat IRC
[x] OpenOffice Writer
[x] OpenOffice Calc
[x] Adobe Reader
Sound & Video:
[x] Rhythmbox Music Player
[x] Sound Juicer CD Extractor
[x] VLC Media Player
[x] Real Player
[ ] Nvu
[x] Quanta Plus
[x] VMware Server
[x] TrueType fonts
[x] Read/Write support for NTFS partitions
So everything is installed except for Nvu...