Protected Mode for Flash Player for Firefox

Since the update to Flash Player 11.3, a protected mode was added as a new security feature for Firefox 4.0 and above on Windows Vista and higher. This security enhancement is designed to limit the impact of attacks from malicious Flash content.

When Flash content won't display: errors on YouTube like "An error has occurred Please try again later." or when the Flash Player freezes randomly.

First solution, if RealPlayer is not installed

Open Firefox,

  • Go
  • Uncheck the McAfee installation,
  • Click Download Now,
  • Click Save the file,
  • Then at the end of the download, run Flash Player
  • Install it (This will update Flash palyer)
  • Restart Mozilla Firefox.

Second solution, if you have RealPlayer

  • Please disable the Real-Player downloader plug-in.
  • Launch RealPlayer
  • Click on the RealPlayer icon in the upper left corner and select Preferences
  • Select Download and Recording.
  • Uncheck "Enable Web downloading and recording for these installed browsers"
  • Click OK and close RealPlayer,
  • Restart Firefox.

Ask a question
CCM is a leading international tech website. Our content is written in collaboration with IT experts, under the direction of Jean-François Pillou, founder of CCM reaches more than 50 million unique visitors per month and is available in 11 languages.
This document, titled « Protected Mode for Flash Player for Firefox », is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM (