Enable Wayland backend on Fedora 34/KDE/Plasma (and other compositors) by default.

firefox.sh.in

@@ -70,10 +70,13 @@ GETENFORCE_FILE="/usr/sbin/getenforce"
 ##
 ## Enable Wayland backend?
 ##
-if __DEFAULT_WAYLAND__ && ! [ $MOZ_DISABLE_WAYLAND ]; then
+if ! [ $MOZ_DISABLE_WAYLAND ]; then
   if [ "$XDG_CURRENT_DESKTOP" == "GNOME" ]; then
     export MOZ_ENABLE_WAYLAND=1
   fi
+  if __DEFAULT_WAYLAND__ && [ "$XDG_SESSION_TYPE" = "wayland" ]; then
+    export MOZ_ENABLE_WAYLAND=1
+  fi
 fi
 
 ##

firefox.spec

@@ -20,6 +20,12 @@
 %global test_offscreen    1
 %global test_on_wayland   0
 
+# Enable Wayland on all Wayland compositors (Gnome/KDE/Sway) by default.
+%global default_wayland   0
+%if 0%{?fedora} > 33
+%global default_wayland   1
+%endif
+
 # There are still build problems on s390x, see
 # https://koji.fedoraproject.org/koji/taskinfo?taskID=55048351
 # https://bugzilla.redhat.com/show_bug.cgi?id=1897522
@@ -163,7 +169,7 @@ ExcludeArch: armv7hl
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        85.0
-Release:        7%{?pre_tag}%{?dist}
+Release:        8%{?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
@@ -776,7 +782,12 @@ desktop-file-install --dir %{buildroot}%{_datadir}/applications %{SOURCE29}
 
 # set up the firefox start script
 %{__rm} -rf %{buildroot}%{_bindir}/firefox
-%{__sed} -e 's/__DEFAULT_WAYLAND__/true/' \
+%{__sed} \
+%if %{?default_wayland}
+         -e 's/__DEFAULT_WAYLAND__/true/' \
+%else
+         -e 's/__DEFAULT_WAYLAND__/false/' \
+%endif
          -e 's,/__PREFIX__,%{_prefix},g' %{SOURCE21} > %{buildroot}%{_bindir}/firefox
 %{__chmod} 755 %{buildroot}%{_bindir}/firefox
 
@@ -1024,6 +1035,10 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Sat Jan 30 2021 Martin Stransky <stransky@redhat.com> - 85.0-8
+- Enable Wayland backend on Fedora 34/KDE/Plasma (and other compositors)
+  by default (https://bugzilla.redhat.com/show_bug.cgi?id=1922608).
+
 * Fri Jan 29 2021 Martin Stransky <stransky@redhat.com> - 85.0-7
 - Added clipboard fix mozbz#1631061.