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Facebook Stack
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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.