diff --git a/xsoft/graphweb/firefox.xml b/xsoft/graphweb/firefox.xml
index 3c3b4d53d8..16c358aef4 100644
--- a/xsoft/graphweb/firefox.xml
+++ b/xsoft/graphweb/firefox.xml
@@ -174,7 +174,9 @@ ac_add_options --disable-libnotify
 
 # GStreamer is necessary for H.264 video playback in HTML5 Video Player;
 # to be enabled, also remember to set "media.gstreamer.enabled" to "true"
-# in about:config. If you have GStreamer 1.x.y, uncomment this line:
+# in about:config. If you have GStreamer 1.x.y, comment out this line and
+# uncomment the following one:
+ac_add_options --disable-gstreamer
 #ac_add_options --enable-gstreamer=1.0
 
 # Uncomment these lines if you have installed optional dependencies: