how adjust toolbar fonts in iceweasel?

["Douglas A. Tutty" <dtutty@vianet.ca>]

hello all,

I use Iceweasel with icewm (no DTE).  I've temporarily switched from my
21" monitor to a very small one and the fonts on e.g. the toolbars in
iceweasel are too big.  For Konqueror I found some K settings app to
change those fonts.  Is there a simple app to install to change them for
Iceweasel?  I don't want to have to install a GTK DTE just to change
some settings.

Thanks,

Doug.