Flash Player Plugin 21.0.0.226 to 21.0.0.242 (click-to-play) has been blocked for your protection.

Why was it blocked?
Old versions of the Flash Player plugin have known vulnerabilities. All users are strongly recommended to check for updates on our plugin check page.
Who is affected?
All users who have these versions of the Flash plugin 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.