A Blog From Behind the Trenches

More details on this is coming, but here's something to get you started.

How it works

All site-specific overrides are stored in opera6.ini. If you want to add overrides for a specific site, add the domain name in the "[Overrides]" section. Then, add a new section with the domain name, e.g. "[www.opera.com]". Each item in that section will override the Opera default for that domain. Items have two parts: the INI section where the setting is stored and the setting name separated by a vertical bar, e.g. "Extensions|Scripting=0". The following settings will disable scripting at www.opera.com:

[Overrides]
www.opera.com

[www.opera.com]
Extensions|Scripting=0

Overrides can be disabled by setting the domain name to 0, e.g. "www.opera.com=0" in the "[Overrides]" section. Override matching is done on sub-domain basis, so the server www.example.com will be matched by an override for example.com, but not vice versa. If overrides are defined both for the exact match and for the general domain, the longest match will always take precedence.

Available site-specific preferences

Here are some of the available site-specific preferences.

User Prefs|Ignore Unrequested Popups
User Prefs|Target Destination
User Prefs|User JavaScript
User Prefs|User JavaScript File
User Prefs|Allow Script To Hide URL
User Prefs|Enable Referrer

Multimedia|Always Load Favicon

Extensions|Scripting

User Display Mode|Author CSS
User Display Mode|User CSS
Author Display Mode|Author CSS
Author Display Mode|User CSS

User Agent|Spoof UserAgent ID

Proxy|*
Fonts|*
Colors|*