This is GtkMozEdit, an editable subclass of mozilla's GtkMozEmbed widget. The gtkmozedit library also contains a partial gobject binding for mozilla's DOM classes. The goal is to implement support for gtk's related interfaces like GtkEditable and to have full coverage of the DOM classes.
Python bindings that cover 100% of the c API are provided too. Most likely finer package granularity will be introduced at some point though (gtkmozedit.dom, gtkmozedit.dom.html ...).
