More than six years after Facebook launched its ambitious Free Basics program to bring the Internet to the masses, the social network is back at it again with a new zero-rating initiative called Discover.
Facebook Discover is currently being tested in Peru in partnership with local telecom companies such as Bitel, Claro, Entel, and Movistar.
Unlike the regular rich-content browsing, Facebook's latest connectivity project only provides low-bandwidth text-only based browsing, meaning other forms of data-intensive content such as audio and video are not supported.
This web-based proxy service runs within a whitelisted domain under "freebasics.com" that the operator makes the service available for free (e.g. "https://example.com" is rewritten as "https://https-example-com.0.freebasics.com"), which then fetches the webpages on behalf of the user and deliver them to their device.
Furthermore, to prevent impersonation of the Discover domain by phishing sites, the service blocks navigation attempts to such links by sandboxing the iframe, thus preventing it from executing untrusted code.