Play wmv in firefox

Open a terminal
Applications > Accessories > Terminal
and run these commands one at a time and your password wont be shown when you type it in just type it in and hit enter.
This first one enables the medibuntu repository for restricted codecs and such

Code:

sudo wget --output-document=/etc/apt/sources.list.d/medibuntu.list http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list && sudo apt-get --quiet update && sudo apt-get --yes --quiet --allow-unauthenticated install medibuntu-keyring && sudo apt-get --quiet update

Remove any browser media player plugin you currently have installed (totem-mozilla is installed by default, but you may have installed mozilla-mplayer or mozilla-plugin-vlc) like this:

Code:

sudo apt-get remove totem-mozilla mozilla-mplayer mozilla-plugin-vlc

then for all the multimedia, mp3's, divx web player, and dvd playback

Code:

sudo apt-get install ubuntu-restricted-extras libdvdcss2 gecko-mediaplayer vlc

Oracle Java is part of the ubuntu-restricted-extras package so use your arrow keys and Tab key to select and Enter to accept the Java terms of use since Oracle now owns Sun.
And to get rid of one package in the restricted extras that causes problems:

Code:

sudo apt-get purge ttf-mscorefonts-installer

ttf-mscorefonts-installer bug report
https://bugs.launchpad.net/debian/+s...ts/+bug/431217

And to install Flash (the same as going to the adobe website) just click this link if using 9.04 or up, then on OK

And you're done.
Close and reopen firefox and try again