Press F12 or Ctrl + Shift + I ( Cmd + Option + I on Mac) while on Facebook.

To truly understand the difference between view-source: and the live DOM, perform this experiment:

This is entirely false. This code string actually represents a list of your existing friends ranked by who you interact with most frequently via chat, comments, or likes. Facebook's official privacy policy explicitly states that they do not provide a tool or a method to see who views your profile, and that data is not exposed anywhere in the public source code. Hacking and Security Risks

If you want to "create a feature" for your own website using Facebook's code or plugins: Embedded Posts: To feature a Facebook post on your own site, click the three-dot menu on a public post and select

Facebook is a closed-source application, and its code is a fortress of obfuscation, minification, and custom encryption—by deliberate and considered design.