Mendeley Importer has been blocked for your protection.

Why was it blocked?
The add-on does not comply with Mozilla's requests to provide reviewable source code and is suspected to violate Mozilla's add-on policies by collecting data without disclosure or consent.
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.