URI schemes

The scheme of a URI is the first part of the URI, before the : character. It indicates which protocol the browser must use to fetch the resource. The scheme may affect how the rest of the URI is structured and interpreted.

Syntax

url
protocol:
protocol

A sequence of characters that identifies the protocol to use. It should consist of only alphanumeric characters and the +, -, and . characters. Common schemes are:

blob

Binary Large Object; a pointer to a large in-memory object

data

Data directly embedded in the URL

file

Host-specific file names

ftp
File Transfer Protocol
http / https

Hyper text transfer protocol (Secure) (HTTP/HTTPS)

javascript

URL-embedded JavaScript code

mailto

Electronic mail address

resource

Firefox and Firefox browser extensions to load resources internally

ssh

Secure shell

tel

telephone

urn

Uniform Resource Names

view-source

Source code of the resource

ws / wss

WebSocket connections (Secure)

See also