Adobe Flash for Firefox and Chrome on Ubuntu

Quick install:

Download the latest Flash .tgz from Adobe

Unpack the .tgz

Open the Terminal and enter:
sudo mv libflashplayer.so /usr/lib/mozilla/plugins/libflashplayer.so
sudo mkdir /opt/google/chrome/plugins
sudo cp /usr/lib/mozilla/plugins/libflashplayer.so /opt/google/chrome/plugins

Restart browser and that's it.