Am Samstag, 15. März 2014, 13:45:59 schrieb David Bell:
> On Saturday 15 March 2014 13:37:29 Werner Joss wrote:
> > Am Samstag, 15. März 2014, 12:34:14 schrieb David Bell:
> > > I would like to use Firefox as my default browser but there doesn't seem
> > > to be  a way of implementing this in <Control Centre>.
> > 
> > try
> > control-center->kde settings->file assiciations->text->html
> > (translated from german, might differ somewhat for you
> > there you can select multiple browsers, as well as the one with highest
> > priority
> > HTH
> > Werner
> 
> Many thanks Werner, it worked!

ok, fine, you're welcome.
(btw., this setting is still mostly the same in kde4, not very obvious, IMHO)
Werner