If anyone knows of some foolproof way to install the Flash plugin in Firefox in Ubuntu 64bit version (Edgy Eft); feel free to share.
(Both Ubuntu & Firefox are 64bit versions)

(I haven't tested the above method yet)

Well, it works (both with Flash 7 & Flash 9(Beta))
But don't forget to install the viewer viewer plugin.

Okay, seems I was too fast. Apparently, sound only works with Flash 7.