- it won't be in Preferences for now, as changing user agent
is really not the thing that every user should do.
If you don't know what are you doing, you can get unexpected
behaviour on some sites.
So you have to edit settings.ini file in your profile directory.
More informations at FAQ (last question)
Finally added support to manage search engines. You can add search
engines from sites that supports opensearch standard, but you can also
add them manually.
There is also possibility to specify shortcuts for quickly searching in
location bar on your favourite engines.