--- a/MozillaFirefox/MozillaFirefox.spec	Wed May 27 09:13:22 2020 +0200
+++ b/MozillaFirefox/MozillaFirefox.spec	Thu May 28 08:59:15 2020 +0200
@@ -18,9 +18,9 @@
 
 
 # changed with every update
-%define major          76
-%define mainver        %major.0.1
-%define orig_version   76.0.1
+%define major          77
+%define mainver        %major.0
+%define orig_version   77.0
 %define orig_suffix    %{nil}
 %define update_channel release
 %define branding       1
@@ -29,8 +29,8 @@
 # disable for FF73 for now as it fails for unknown reason
 %define do_profiling   0
 
-# always build with GCC as SUSE Security Team requires that
-%define clang_build 0
+# upstream default is clang (to use gcc for large parts set to 0)
+%define clang_build 1
 
 # PIE, full relro
 %define build_hardened 1
@@ -84,14 +84,14 @@
 BuildRequires:  libproxy-devel
 BuildRequires:  makeinfo
 BuildRequires:  mozilla-nspr-devel >= 4.25
-BuildRequires:  mozilla-nss-devel >= 3.51.1
+BuildRequires:  mozilla-nss-devel >= 3.52.1
 BuildRequires:  nasm >= 2.14
 BuildRequires:  nodejs10 >= 10.19.0
 BuildRequires:  python-devel
 BuildRequires:  python2-xml
 BuildRequires:  python3 >= 3.5
 BuildRequires:  rust >= 1.41
-BuildRequires:  rust-cbindgen >= 0.13.1
+BuildRequires:  rust-cbindgen >= 0.14.1
 BuildRequires:  startup-notification-devel
 BuildRequires:  unzip
 BuildRequires:  update-desktop-files