diff --git a/helpers/DATA/firefox/settings.js b/helpers/DATA/firefox/settings.js
index 0f02a21f39aceeb641ca0b7ccfa27412f13eb8b1..91d61fa79369759a31cdba4d75f754684ace7d05 100644
--- a/helpers/DATA/firefox/settings.js
+++ b/helpers/DATA/firefox/settings.js
@@ -156,8 +156,9 @@ pref("font.default.x-western", "sans-serif");
 
 // Disable Gecko media plugins: https://wiki.mozilla.org/GeckoMediaPlugins
 pref("media.gmp-manager.url", "http://127.0.0.1/");
+pref("media.gmp-provider.enabled", false);
 // Don't install openh264 codec
-pref("media.gmp-gmpopenh264.provider.enabled", false);
+pref("media.gmp-gmpopenh264.enabled", false);
 
 //Disable middle click content load
 //Avoid loading urls by mistake 
diff --git a/helpers/make-firefox b/helpers/make-firefox
index 4b6d008b45fe22a4bd6e8fec2f98105f2d51bc50..f7f7318040ffb45f4f9dd1cee61e1161696030f4 100644
--- a/helpers/make-firefox
+++ b/helpers/make-firefox
@@ -18,7 +18,7 @@
 #    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 #
 
-VERSION=37
+VERSION=38
 
 . ./config