Looks like the braces might be causing problems on the Windows FF tinderbox, so removing that one.

allmakefiles.sh

@@ -891,7 +891,6 @@ MAKEFILES_phoenix="
 browser/Makefile
 browser/app/Makefile
 browser/app/profile/extensions/Makefile
-browser/app/profile/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}/Makefile
 browser/base/Makefile
 browser/components/Makefile
 browser/components/bookmarks/Makefile