Instructions
Turn on your PS3.
Select "Network and then "Internet." This will open the PS3's web browser.
Visit a web page that requires Flash player. Try YouTube or Metacafe, two popular video file sharing sites.
Wait for the page to load. A box will appear on your TV screen notifying you that your system is missing the required Flash plug-in that the page needs to load properly.
Click "X" to download the plug-in and install Flash on your PS3.