Apple QuickTime Plugin has been blocked for your protection.

Why was it blocked?
This plugin has multiple remote code execution security vulnerabilities and causes a high volume of Firefox and SeaMonkey crashes.
Who is affected?
Users of QuickTime version 7.1 for Firefox 3 on Windows.

Users of QuickTime version 7.1 for SeaMonkey and later on Windows.
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.