MSNNow (discontinued social provider) has been blocked for your protection.

Why was it blocked?
As part of their ongoing work to fine-tune their editorial mix, msnNOW has decided that msnNOW will stop publishing on Dec. 3, 2013. Rather than having a single home for trending content, they will continue integrating that material throughout all MSN channels. A big thank you to everyone who followed msnNOW stories using the Firefox sidebar
Who is affected?
All Firefox users who have 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.