Opera-specific About: URIs
about is an alias for opera, therefore all these URIs also work with about prefixed. User JavaScript is disabled for all URIs in the about or opera URI schemes as a security feature. These pages can, however, be styled using local stylesheets.
None of these functions, except the opera:about combination, work in the Nintendo DS version of the Opera browser, the Nintendo DS Browser.
| URIs | Opera |
|---|---|
| opera:blank | Maps to about:blank |
| opera:about | Provides info about the browser and the configured paths. |
| about:opera | Maps to opera:about |
| opera:cache | Shows the content of the cache. |
| opera:config | (Opera 9.0 and newer) Shows a page that allows changing of numerous browser preferences, many of which cannot be accessed through the normal Preferences window |
| opera:drives | (Operating system specific) Shows the local drives of the host system. |
| opera:history | Shows the content of the browser history. |
| opera:historysearch | (Opera 9.5 and newer) Shows the start page of internal search engine for the browser history. |
| opera:plugins | Shows installed plug-ins. Opera 11 and newer allow you to disable individual plug-ins from this page. |
| opera:button | Defines a custom button as a set of Opera actions. (Note: This does not work directly, you need to specify all button parameters as on CustomButtons.) |
| opera:help | Shortcut to the help directory. This can be either local or external. |
| opera:debug | (Opera 9.5 and newer) Shows a page that allows changing of settings for remote debug of Opera via Opera Dragonfly |
| opera:memdebug | (Opera 9.5 and newer) Shows debug information about memory usage. |
| opera:webstorage | (Opera 10.5 and newer) Shows information Web Storage (see HTML5). |
| opera:webdatabases | (Opera 10.5 and newer) Shows information Web Storage databases (see HTML5). |
| opera:gpu | Shows information about hardware accelerated graphics and GPU support. |
| opera:cpu | (Introduced in Opera 12 beta). Displays CPU usage. |
Read more about this topic: About URI Scheme