Facebook Stack

Facebook.com is built with the following tech stack:

Document Encoding

UTF-8

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.

Document Standards

Meta Description

The description attribute provides a concise explanation of the page content.

Open Graph Protocol

The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook

Cascading Style Sheets

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML

Canonical Content Tag

Public specification of a preferred URL for a page allows search engines to understand the original location for content.

HREF Lang

Contains language specific links.

Web App Manifest

Defines the attributes of a web app in a simple JSON file. It describes how the web app should appear on the users system and how it should launch.

JSON-LD

JSON-LD, or JavaScript Object Notation for Linked Data, is a method of transporting Linked Data using JSON.

HTML5 DocType

The DOCTYPE is a required preamble for HTML5 websites.

HTML 5 Specific Tags

This page contains tags that are specific to an HTML 5 implementation.

Content Security Policy

Content Security Policy is a computer security concept, to prevent cross-site scripting XSS attacks.

Report URI CSP

Report-uri directive instructs the user agent to report attempts to violate the Content Security Policy.

X-XSS-Protection

X-XSS-Protection is a HTTP header set by Internet Explorer 8+. This header lets domains toggle on and off the "XSS Filter" of IE8, which prevents some categories of XSS attacks.

Content Type Options

Used to disable MIME-sniffing for a particular HTTP response.

Strict Transport Security

The HTTP Strict-Transport-Security (HSTS) header instructs the browser to only use https.

SSL Certificates

HSTS

Forces browsers to only communicate with the site using HTTPS.

Mobile

Viewport Meta

This page uses the viewport meta tag which means the content may be optimized for mobile content.

Mobile Non Scaleable Content

This content is formatted for mobile devices, it does not allow the content to be scaled.

Apple Mobile Web App Capable

Launches a web application for Safari on iOS in full-screen mode to look like a native application.

Language

Saudi Arabia HREF LANG

This webpage has alternate versions available in Saudi Arabia via the use of the hreflang tag.

Bulgaria HREF LANG

This webpage has alternate versions available in Bulgaria via the use of the hreflang tag.

Denmark HREF LANG

This webpage has alternate versions available in Denmark via the use of the hreflang tag.

Danish HREF LANG

This webpage has alternate versions available in Danish via the use of the hreflang tag.

Greek HREF LANG

This webpage has alternate versions available in Greek via the use of the hreflang tag.

United States HREF LANG

This webpage has alternate versions available in United States via the use of the hreflang tag.

Spain HREF LANG

This webpage has alternate versions available in Spain via the use of the hreflang tag.

Spain HREF LANG

This webpage has alternate versions available in Spain via the use of the hreflang tag.

Farsi - Persian HREF LANG

This webpage has alternate versions available in Farsi - Persian via the use of the hreflang tag.

Finland HREF LANG

This webpage has alternate versions available in Finland via the use of the hreflang tag.

France HREF LANG

This webpage has alternate versions available in France via the use of the hreflang tag.

Canada HREF LANG

This webpage has alternate versions available in Canada via the use of the hreflang tag.

Hindi HREF LANG

This webpage has alternate versions available in Hindi via the use of the hreflang tag.

Croatian HREF LANG

This webpage has alternate versions available in Croatian via the use of the hreflang tag.

Indonesian HREF LANG

This webpage has alternate versions available in Indonesian via the use of the hreflang tag.

Italy HREF LANG

This webpage has alternate versions available in Italy via the use of the hreflang tag.

Korea HREF LANG

This webpage has alternate versions available in Korea via the use of the hreflang tag.

Malay HREF LANG

This webpage has alternate versions available in Malay via the use of the hreflang tag.

Poland HREF LANG

This webpage has alternate versions available in Poland via the use of the hreflang tag.

Portugal HREF LANG

This webpage has alternate versions available in Portugal via the use of the hreflang tag.

Portugal HREF LANG

This webpage has alternate versions available in Portugal via the use of the hreflang tag.

Romanian HREF LANG

This webpage has alternate versions available in Romanian via the use of the hreflang tag.

Serbian HREF LANG

This webpage has alternate versions available in Serbian via the use of the hreflang tag.

Thai HREF LANG

This webpage has alternate versions available in Thai via the use of the hreflang tag.

Vietnamese HREF LANG

This webpage has alternate versions available in Vietnamese via the use of the hreflang tag.