The page Site.Preferences contains customisable browser preference settings.
A different page than Site.Preferences can be chosen by making a copy of that page under a new name, customising it, and setting a cookie which will point to this page for the browser being used, through
SomeGroup.CustomPreferences being the name of the new customised preference page.
Notes and Comments
Note that in order to enable parsing of Site.Preferences by default, a line like the following needs to be added to local/config.php: