The DOM Inspector extension works pefectly in Conkeror. Open the DOM Inspector in a running Conkeror like so:

conkeror -batch -inspector

There is a Conkeror module, dom-inspector, that defines several commands for inspecting various objects. To use it, put the following in your rc:

require("dom-inspector");

This module defines the following commands:

inspector

inspect-chrome

inspect-page

inspect-click

See also:

Extensions