View-sourcehttps M.facebook.com Home.php Hot! -
: Refers to the mobile-optimized version of Facebook. home.php : Refers to your Facebook News Feed or "Home" page.
| Browser | Support Status | Notes | | :--- | :--- | :--- | | | Supported | Supported in all modern versions, though early versions had security issues that were later resolved. | | Google Chrome | Supported | Support is present but with additional security restrictions to prevent cross-site scripting (XSS) attacks. | | Safari | Supported | Safari supports the scheme, though its behavior can vary between versions. | | Internet Explorer | Not Supported (Modern) | Support was dropped starting with Windows XP SP2 due to security vulnerabilities that allowed malicious scripts to access local system files. |
– Instead of traditional CSS files, Facebook uses atomic CSS generated at build time, where styles grow with unique declarations rather than with features. This approach reduced a 500 KB CSS bundle to just 50 KB for initial page loads. View-sourcehttps M.facebook.com Home.php
In HTML, comments are denoted by <!-- --> . They are invisible to the user. They are notes left by developers for other developers. Usually, they say things like <!-- TODO: Fix this later --> or <!-- Ad unit goes here --> .
<div id="stream_pagelet"> <div class="loading">Loading stories...</div> </div> <script> // BigPipe onload script to fetch actual content </script> : Refers to the mobile-optimized version of Facebook
One of the most striking features is the extensive use of CSS custom properties (variables) at the very beginning of the document:
He typed a new command into the browser console, a simple query to strip the "rendered" layer away and leave the raw data. document.body.innerText = ''; document.body.innerHTML = document.documentElement.outerHTML; | | Google Chrome | Supported | Support
While Facebook has long since migrated to sophisticated routing systems and a custom-built programming language (Hack), many legacy endpoints like /home.php remain active as aliases for backward compatibility. Even today, typing facebook.com/home.php into your browser will reliably redirect you to your personalized news feed.
