QuickTime Plugin for Windows has been blocked for your protection.

Why was it blocked?
The QuickTime Plugin for Windows has been discontinued by Apple and has known critical security vulnerabilities. All users are strongly encouraged to remove it or keep it disabled.
Who is affected?
All users who have the QuickTime Plugin for Windows installed.
What does this mean?

The problematic add-on or plugin will be automatically disabled and no longer usable.

When Mozilla becomes aware of add-ons, plugins, or other third-party software that seriously compromises Firefox security, stability, or performance and meets certain criteria, the software may be blocked from general use. For more information, please read this support article.