diff -up firefox-63.0.1/browser/installer/package-manifest.in.old firefox-63.0.1/browser/installer/package-manifest.in
--- firefox-63.0.1/browser/installer/package-manifest.in.old	2018-11-14 11:01:54.326071733 +0100
+++ firefox-63.0.1/browser/installer/package-manifest.in	2018-11-14 11:02:04.402045863 +0100
@@ -512,8 +512,8 @@
 
 ; [Layout Debugger]
 #ifdef MOZ_DEBUG
-@RESPATH@/chrome/layoutdebug@JAREXT@
-@RESPATH@/chrome/layoutdebug.manifest
+#@RESPATH@/chrome/layoutdebug@JAREXT@
+#@RESPATH@/chrome/layoutdebug.manifest
 #endif
 
 ; [Personal Security Manager]