Documentation

Opera is famous for its speed, small size, security, customization and standards-support. These documents allow for a look behind the user interface, and supply advice for changing files and advanced settings.

Specifications

Opera prides itself in supporting all major Web standards currently in use, including CSS 2.1, XHTML 1.1, HTML 4.01, WML 2.0, ECMAScript, DOM 2 and SVG 1.1 tiny.

Web standards supported in Opera