YouTube Downloader has been blocked for your protection.

Why was it blocked?

The installer that includes this add-on performs Firefox settings changes separately from the add-on install, making it very difficult to opt-out to these changes.

Who is affected?

All Firefox users who have this add-on installed. Users who want to enable the add-on again can do so in the Add-ons Manager tab.

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.