--- build/moz.configure/old.configure	2022-06-08 21:10:25.000000000 +0200
+++ build/moz.configure/old.configure	2022-07-11 14:04:06.231167162 +0200
@@ -246,6 +246,7 @@
     '--enable-zipwriter',
     '--includedir',
     '--libdir',
+    '--mandir',
     '--prefix',
     '--with-app-basename',
     '--with-app-name',
--- comm/suite/installer/Makefile.in	2021-08-08 15:29:32.000000000 +0200
+++ comm/suite/installer/Makefile.in	2022-07-11 14:04:44.710104711 +0200
@@ -145,6 +145,10 @@
 
 include $(topsrcdir)/toolkit/mozapps/installer/packager.mk
 
+install::
+	$(NSINSTALL) -D $(DESTDIR)$(mandir)/man1
+	$(SYSINSTALL) $(IFLAGS1) $(DIST)/man/man1/$(MOZ_APP_NAME).1 $(DESTDIR)$(mandir)/man1
+
 ifeq (Darwin, $(OS_ARCH))
 BINPATH = $(_BINPATH)
 DEFINES += -DAPPNAME=$(_APPNAME)