DjVu Plugin Viewer 6.1.1 and earlier (Mac OS) has been blocked for your protection.

Why was it blocked?
Versions 6.1.1 and earlier of this plugin are known to have security vulnerabilities.
Who is affected?
All Firefox users who have this plugin installed. Updated versions can be found on this site.
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.