This has gotten so much more advanced since the days of the Firefox plugin. I just installed it, and I have to admit, getting rid of all the UI cruft that adorns normal browsers is really a welcome change. I know Emacs pretty well, so using it comes naturally. Thanks for posting this; I'd written off the extension version, but the XULRunner based version is fabulous.
How on earth did they get this far in development without thinking about how confusing their name is with the original KDE browser Konqueror? http://www.konqueror.org/
It was actually originally named after a beer. There has been discussion of changing the name but not much interest as most communication about it is in text where the name isn't confusing. Or is at least less so.
Who wants to port javascript to elisp?
There is actually another plan to build a QT version built on top of WebKit. It hasn't started yet though s they are waiting on more mature QT bindings. http://minno.sourceforge.net/cgi-bin/moin.cgi