[arch-general] no desktop: howto change default browser?

Hi, when using eg. "evince" to view a PDF document, links open in "epiphany", which seems to be a gnome default browser. I need to change this, but all the links the <search engine> comes up with hint at using menus like "system -> ... -> browser". I only run a window-manager, no desktop, so there's no such thing as a "system" menu entry. I have used "gconf-editor", added the directory chain "~/.gconf/desktop/gnome/url-handlers/{http,https}" with keys "command" -> 'firefox "%s"', "enabled" -> ticked, "needs_terminal" -> not-ticked, but these settings don't help. Does somebody know how to change the setting for default-browser when no desktop is used? clemens