Reverting RLbox enablement because the sysroot is not on the koji builders - obviously. I was confused by my local envinment which went fine during local build.

firefox-mozconfig

@@ -16,7 +16,7 @@ ac_add_options --with-system-fdk-aac
 ac_add_options --enable-js-shell
 ac_add_options --with-unsigned-addon-scopes=app,system
 ac_add_options --without-sysroot
-ac_add_options --disable-bootstrap
+ac_add_options --without-wasm-sandboxed-libraries
 
 export BUILD_OFFICIAL=1
 export MOZILLA_OFFICIAL=1

firefox.spec

@@ -163,7 +163,7 @@ ExcludeArch: aarch64
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        101.0.1
-Release:        7%{?pre_tag}%{?dist}
+Release:        6%{?pre_tag}%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Source0:        https://archive.mozilla.org/pub/firefox/releases/%{version}%{?pre_version}/source/firefox-%{version}%{?pre_version}.source.tar.xz
@@ -317,8 +317,9 @@ BuildRequires:  llvm
 BuildRequires:  llvm-devel
 BuildRequires:  clang
 BuildRequires:  clang-libs
-# needed for wasm-ld
+%if %{build_with_clang}
 BuildRequires:  lld
+%endif
 
 BuildRequires:  pipewire-devel
 
@@ -1119,9 +1120,6 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
-* Wed Jun 22 2022 Jan Horak <jhorak@redhat.com> - 101.0.1-7
-- Enable rlbox (third party libraries sandboxing)
-
 * Fri Jun 17 2022 Martin Stransky <stransky@redhat.com>- 101.0.1-6
 - Added fix for mozbz#1774271 - Intel/dmabuf export issues.