To perform a SmartWhois query for the current URL or hyperlink,
select SmartWhois Query/Send Link
To SmartWhois in the context menu of the page or
Find the swlaunch.xpi
file in the SmartWhois application folder, drag it to the browser
window and follow further instructions.
By default, Mozilla/SeaMonkey Navigator does not have the
functionality for automatic extension removal. You can use one of
the third-party extension managers, for example, ExtensionManager
by Jeremy Gillick (you will also need to install
ExtensionUninstaller API to make it work).