How to Install Adobe Flash Plugin on Firefox in Ubuntu 12.04 64 bit

1. Download the plugin as prompted by the Firefox
2. cd /tmp
3. gunzip ~/Download/install_flash_player_11_linux.x86_64.tar.gz
4. unzip  xvf ~/Download/install_flash_player_11_linux.x86_64.tar
5. sudo cp libflashplayer.so /usr/lib/mozilla/plugins/
6. sudo cp -r usr/* /usr
7. restart Firefox
Enjoy your Firefox!