Added fix for rhbz#1709840

firefox.spec

@@ -142,6 +142,7 @@ Patch412:        mozilla-1337988.patch
 Patch415:        Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch
 Patch417:        bug1375074-save-restore-x28.patch
 Patch418:        mozilla-1512162.patch
+Patch419:        mozilla-1568569.patch
 
 # Wayland specific upstream patches
 Patch574:        firefox-pipewire.patch
@@ -321,6 +322,10 @@ This package contains results of tests executed during build.
 %endif
 %patch3  -p1 -b .arm
 %patch44 -p1 -b .build-arm-libopus
+# Patch for big endian platforms only
+%if 0%{?big_endian}
+%patch26 -p1 -b .icu
+%endif
 
 # Fedora patches
 %patch215 -p1 -b .addons
@@ -340,10 +345,7 @@ This package contains results of tests executed during build.
 %patch415 -p1 -b .1238661
 %endif
 %patch418 -p1 -b .1512162
-# Patch for big endian platforms only
-%if 0%{?big_endian}
-%patch26 -p1 -b .icu
-%endif
+%patch419 -p1 -b .1568569
 
 # Wayland specific upstream patches
 %patch574 -p1 -b .firefox-pipewire

mozilla-1568569.patch

@@ -0,0 +1,73 @@
+diff --git a/widget/gtk/nsWindow.cpp b/widget/gtk/nsWindow.cpp
+--- a/widget/gtk/nsWindow.cpp
++++ b/widget/gtk/nsWindow.cpp
+@@ -3238,16 +3238,18 @@ void nsWindow::OnWindowStateEvent(GtkWid
+   // We don't care about anything but changes in the maximized/icon/fullscreen
+   // states
+   if ((aEvent->changed_mask &
+        (GDK_WINDOW_STATE_ICONIFIED | GDK_WINDOW_STATE_MAXIMIZED |
+         GDK_WINDOW_STATE_FULLSCREEN)) == 0) {
+     return;
+   }
+ 
++  nsSizeMode lastSizeState = mSizeState;
++
+   if (aEvent->new_window_state & GDK_WINDOW_STATE_ICONIFIED) {
+     LOG(("\tIconified\n"));
+     mSizeState = nsSizeMode_Minimized;
+ #ifdef ACCESSIBILITY
+     DispatchMinimizeEventAccessible();
+ #endif  // ACCESSIBILITY
+   } else if (aEvent->new_window_state & GDK_WINDOW_STATE_FULLSCREEN) {
+     LOG(("\tFullscreen\n"));
+@@ -3261,16 +3263,28 @@ void nsWindow::OnWindowStateEvent(GtkWid
+   } else {
+     LOG(("\tNormal\n"));
+     mSizeState = nsSizeMode_Normal;
+ #ifdef ACCESSIBILITY
+     DispatchRestoreEventAccessible();
+ #endif  // ACCESSIBILITY
+   }
+ 
++  // Fullscreen video playback may generate bogus alpha values which blends
++  // with desktop background in fullscreen video playback (Bug 1568569).
++  // As a workaround enable to draw mShell background in fullscreen mode
++  // if we draw to mContainer.
++  if (gtk_widget_get_has_window(GTK_WIDGET(mContainer))) {
++    if (mSizeState == nsSizeMode_Fullscreen) {
++      gtk_widget_set_app_paintable(mShell, FALSE);
++    } else if (lastSizeState == nsSizeMode_Fullscreen) {
++      gtk_widget_set_app_paintable(mShell, TRUE);
++    }
++  }
++
+   if (mWidgetListener) {
+     mWidgetListener->SizeModeChanged(mSizeState);
+     if (aEvent->changed_mask & GDK_WINDOW_STATE_FULLSCREEN) {
+       mWidgetListener->FullscreenChanged(aEvent->new_window_state &
+                                          GDK_WINDOW_STATE_FULLSCREEN);
+     }
+   }
+ 
+@@ -3787,16 +3801,21 @@ nsresult nsWindow::Create(nsIWidget* aPa
+       eventWidget = (drawToContainer) ? container : mShell;
+ 
+       // Prevent GtkWindow from painting a background to avoid flickering.
+       gtk_widget_set_app_paintable(eventWidget, TRUE);
+ 
+       gtk_widget_add_events(eventWidget, kEvents);
+       if (drawToContainer) {
+         gtk_widget_add_events(mShell, GDK_PROPERTY_CHANGE_MASK);
++        // Don't paint mShell background when we draw to mContainer.
++        // Otherwise we see mShell backround to shine through
++        // mContainer (Bug 1507608).
++        // But it may also lead to various bugs where mContainer has unintended
++        // transparent parts which blend with underlying desktop (Bug 1516224).
+         gtk_widget_set_app_paintable(mShell, TRUE);
+       }
+       if (mTransparencyBitmapForTitlebar) {
+         moz_container_force_default_visual(mContainer);
+       }
+ 
+       // If we draw to mContainer window then configure it now because
+       // gtk_container_add() realizes the child widget.