firefox, CUPS, glib2 et al

Machine running NetBSD-9.2 amd64.
Yesterdasy I installed CUPS binaries from
ftp://ftp.NetBSD.org/pub/pkgsrc/packages/NetBSD/amd64/9.2/All

I accessed the web interface through an already running version of
firefox, which according to pkg_info is firefox-95.0.1nb1.  Although
it identified the network printer I want it to access as available via
ipp, I have yet to get it to print anything.  But note that it
OVERWROTE /etc/printcap without saving the existing version.

Eventually firefox crashed, as it often does, and now will not
restart.  It complains:

XPCOMGlueLoad error for file /usr/pkg/lib/firefox/libmozgtk.so:
/usr/pkg/lib/libgtk-3.so.0: Shared object "libgmodule-2.0.so.0" not
found
Couldn't load XPCOM.

If I try to update firefox:

pkg_add: Warning: package `firefox-117.0.1nb1' was built for a
platform:
pkg_add: NetBSD/x86_64 9.0 (pkg) vs. NetBSD/x86_64 9.2 (this host)
pkg_add: /usr/pkg/pkgdb/glib2-2.70.2nb1/+CONTENTS: No such file or
directory

and

# pkg_add -u -u glib2
pkg_add: Warning: package `glib2-2.76.5' was built for a platform:
pkg_add: NetBSD/x86_64 9.0 (pkg) vs. NetBSD/x86_64 9.2 (this host)
pkg_delete: No matching package for basename `glib2-2.70.2nb1' of
`glib2-2.70.2nb1'
pkg_add: command failed: /usr/sbin/pkg_delete -K /usr/pkg/pkgdb -p
/usr/pkg  glib2-2.70.2nb1

Do I infer correctly that installing CUPS has trashed glib2 without
doing a proper pkg_delete, and so corrupted the package information
data?

How do I put this all right?  I would like a browser that doesn't spew
ou constant errors and warnings and crash frequently, and I want to
control my printer's properties (duplex, tray switching etc.) from
shell scripts.


-- 
Steve Blinkhorn <[email protected]>