Abrowser links to mibbit when opening an irc adress

If you open an irc adress like irc://irc.rbose.org:6670 in abrowser, then the browser tells you to use mibbit on default. mibbit uses sadly a proprietary license. http://wiki.mibbit.com/index.php/WishList#Will_not_Occur < "Will not occur: Releasing Source Code".

You can see change that, if you open that adress in your abrowser (firefox): about:config
and then type in the filter search bar: mibbit

This could be maybe changed if abrowser has chatzilla on default installed or if another external irc client is installed on default (i do not prefer a multi im like pidgin for irc (but i like pidgin for xmpp heh:)) ...