--- a/MozillaFirefox/MozillaFirefox.spec	Fri Jun 08 22:25:59 2018 +0200
+++ b/MozillaFirefox/MozillaFirefox.spec	Fri Jun 08 22:31:03 2018 +0200
@@ -84,7 +84,9 @@
 BuildRequires:  xorg-x11-libXt-devel
 BuildRequires:  yasm
 BuildRequires:  zip
+%if 0%{?suse_version} < 1550
 BuildRequires:  pkgconfig(gconf-2.0)
+%endif
 BuildRequires:  pkgconfig(gdk-x11-2.0)
 BuildRequires:  pkgconfig(glib-2.0) >= 2.22
 BuildRequires:  pkgconfig(gobject-2.0)
@@ -340,6 +342,9 @@
 ac_add_options --includedir=%{_includedir}
 ac_add_options --enable-release
 ac_add_options --enable-default-toolkit=cairo-gtk3
+%if 0%{?suse_version} >= 1550
+ac_add_options --disable-gconf
+%endif
 %if 0%{?build_hardened}
 ac_add_options --enable-pie
 %endif