diff --git a/helpers/DATA/firefox/settings.js b/helpers/DATA/firefox/settings.js
index 91d61fa..34cf23d 100644
--- a/helpers/DATA/firefox/settings.js
+++ b/helpers/DATA/firefox/settings.js
@@ -175,3 +175,10 @@ pref("loop.enabled",false);
 
 // Use old style preferences, that allow javascript to be disabled
 pref("browser.preferences.inContent",false);
+
+// Avoid logjam attack
+pref("security.ssl3.dhe_rsa_aes_128_sha", false);
+pref("security.ssl3.dhe_rsa_aes_256_sha", false);
+pref("security.ssl3.dhe_dss_aes_128_sha", false);
+pref("security.ssl3.dhe_rsa_des_ede3_sha", false);
+
diff --git a/helpers/make-firefox b/helpers/make-firefox
index f7f7318..27b3996 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=38
+VERSION=39
 
 . ./config