Features of the Opera web browser

It would not record browsing history, use the web cache, or stored passwords, and would forget any information accessed in the Tab when it is closed.

Opera 9.2, released 11 April 2007[11] Furthermore, other browsers including, but not limited to; Google Chrome, Safari, and Internet Explorer have or previously had a near identical feature.

Several internet sites provide a regularly updated urlfilter.ini already loaded with the web's most common advertisements so users can block ads using the built-in feature.

The user is able to install custom skins, ranging from color changes to OS mimics to animated GIF images.

Dragonfly is written using standard web technology and the Scope protocol, and source is available under the Apache License 2.0.

Opera also supports the use of access keys to allow a computer user to immediately jump to a specific part of a web page via the keyboard.

Later versions of Opera offered a limited method of cloaking allowing selection from a pre-defined range of options including Mozilla and Internet Explorer.

The version 8 of Opera introduced a further provision for dealing with faulty coding, by providing a set of scripts in BrowserJS that rewrites known broken pages as they are being opened.

The closely related UserJS (similar to Mozilla's Greasemonkey), allows users to run their own code at various times in the processing of a page.