1. Go to: http://get.adobe.com/flashplayer/

2. Select tar.gz installer

3. Click on “Agree and Install” to begin download

4. In terminal, go to the directory where you downloaded the installer (By default, Firefox’s download destination is /home/user/Download.)

5. type in: tar -xzvf install_flash_player.tar.gz to extract file

6. then, type: cd install_flash_player

7. run the installer: ./flashplayer_installer

8. Press Enter and hit ‘y’ to proceed with installation

9. Check if installation is successful though it really is. hehe