Despite all the security measures you have taken to make it easier for Facebook users to use their services safely, now the social network itself pays attention to users accessing the platform through the Tor network using a new experiment just starting, looking to improve the experience in terms of accessibility and security. To do this, have a URL onion, facebookcorewwwi.onion , which may be used only by browsers that support the Tor network by the users who access Facebook through Tor not lose cryptographic protections afforded by this access.
As Facebook continues stating in your ad , the idea is that the direction onionFacebook to connect users to the core infrastructure WWW Facebook, offering end-to-end communication from the browser directly to a data center Facebook. Indicates that you have decided to use SSL security layer on top of this service architectural issues.
Facebook suggests that as a result has provided an SSL certificate on your onion eliminating the SSL certificate warning in the Tor browser, thus increasing the confidence of this service is actually run by Facebook. The social network itself considers this experiment as a novel solution, which serves as an appropriate starting point for discussion, hoping that in time to share some of the lessons they have learned with this experiment.
Later, they incorporated the same support to your mobile web address by onion.