Suchpony (pre 1.6.8) has been blocked for your protection.

Why was it blocked?
Old versions of this add-on contained code from YouTube Unblocker, which was originally blocked due to malicious activity. Version 1.6.8 is now okay.
Who is affected?
All users who have version 1.6.7 or less of this add-on 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.