diff --git a/firefox-38.0-enable-NTLMv1.patch b/firefox-38.0-enable-NTLMv1.patch
new file mode 100644
index 0000000..480e5f6
--- /dev/null
+++ b/firefox-38.0-enable-NTLMv1.patch
@@ -0,0 +1,11 @@
+--- mozilla-release.orig/modules/libpref/init/all.js	2015-05-14 03:57:03.000000000 +0300
++++ mozilla-release/modules/libpref/init/all.js	2015-05-21 12:07:36.577448753 +0300
+@@ -1622,7 +1622,7 @@
+ // For example, "foo.com" would match "http://www.foo.com/bar", etc.
+ 
+ // Force less-secure NTLMv1 when needed (NTLMv2 is the default).
+-pref("network.auth.force-generic-ntlm-v1", false);
++pref("network.auth.force-generic-ntlm-v1", true);
+ 
+ // This list controls which URIs can use the negotiate-auth protocol.  This
+ // list should be limited to the servers you know you'll need to login to.
diff --git a/firefox.spec b/firefox.spec
index b11c681..6a379e2 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -30,7 +30,7 @@ Summary:	Next generation web browser
 Name:		firefox
 Version:	%{major}
 Epoch:		%{ff_epoch}
-Release:	1
+Release:	2
 License:	MPLv1+
 Group:		Networking/WWW
 Url:		http://www.mozilla.com/firefox/
@@ -57,6 +57,7 @@ Patch12:	mozilla-38-kde.patch
 #Patch13:	mozilla-kde-background.patch
 Patch34:	xulrunner_nojit.patch
 Patch35:	firefox-37-build-with-time-independent-uuids.patch
+Patch36:    firefox-38.0-enable-NTLMv1.patch
 
 # Fedora specific patches
 # Unable to install addons from https pages
@@ -181,6 +182,7 @@ Files and macros mainly for building Firefox extensions.
 %endif
 %endif
 %patch35 -p1
+%patch36 -p1
 
 # Fedora patches
 %patch204 -p2 -b .966424