diff --git a/network/web/firefox/files/0001-Bug-1624128-Update-CK_GCM_PARAMS-uses-for-PKCS11-v3..patch b/network/web/firefox/files/0001-Bug-1624128-Update-CK_GCM_PARAMS-uses-for-PKCS11-v3..patch
new file mode 100644
index 0000000000..99c05bb2bb
--- /dev/null
+++ b/network/web/firefox/files/0001-Bug-1624128-Update-CK_GCM_PARAMS-uses-for-PKCS11-v3..patch
@@ -0,0 +1,70 @@
+From c3acffdb8e0cd46561d2c5131227dc92967cf3d2 Mon Sep 17 00:00:00 2001
+From: Kevin Jacobs <kjacobs@mozilla.com>
+Date: Tue, 14 Apr 2020 18:32:19 +0000
+Subject: [PATCH] Bug 1624128 - Update CK_GCM_PARAMS uses for PKCS11 v3.0
+ definition r=keeler
+
+This patch initializes the ulIvBits member of CK_GCM_PARAMS, which is new in PKCS11 v3.
+
+For libprio, we instead define NSS_PKCS11_2_0_COMPAT, which yields the old struct definition.
+
+Differential Revision: https://phabricator.services.mozilla.com/D67740
+---
+ dom/crypto/WebCryptoTask.cpp                 | 1 +
+ netwerk/srtp/src/crypto/cipher/aes_gcm_nss.c | 1 +
+ security/manager/ssl/OSKeyStore.cpp          | 1 +
+ third_party/prio/moz.build                   | 5 +++++
+ 4 files changed, 8 insertions(+)
+
+diff --git a/dom/crypto/WebCryptoTask.cpp b/dom/crypto/WebCryptoTask.cpp
+index ad0d1432738f..60a265972d21 100644
+--- a/dom/crypto/WebCryptoTask.cpp
++++ b/dom/crypto/WebCryptoTask.cpp
+@@ -600,6 +600,7 @@ class AesTask : public ReturnArrayBufferViewTask, public DeferredData {
+       case CKM_AES_GCM:
+         gcmParams.pIv = mIv.Elements();
+         gcmParams.ulIvLen = mIv.Length();
++        gcmParams.ulIvBits = gcmParams.ulIvLen * 8;
+         gcmParams.pAAD = mAad.Elements();
+         gcmParams.ulAADLen = mAad.Length();
+         gcmParams.ulTagBits = mTagLength;
+diff --git a/netwerk/srtp/src/crypto/cipher/aes_gcm_nss.c b/netwerk/srtp/src/crypto/cipher/aes_gcm_nss.c
+index e1fdbe36fbf8..2be2ce932ddf 100644
+--- a/netwerk/srtp/src/crypto/cipher/aes_gcm_nss.c
++++ b/netwerk/srtp/src/crypto/cipher/aes_gcm_nss.c
+@@ -271,6 +271,7 @@ static srtp_err_status_t srtp_aes_gcm_nss_do_crypto(void *cv,
+ 
+     c->params.pIv = c->iv;
+     c->params.ulIvLen = GCM_IV_LEN;
++    c->params.ulIvBits = GCM_IV_LEN * 8;
+     c->params.pAAD = c->aad;
+     c->params.ulAADLen = c->aad_size;
+ 
+diff --git a/security/manager/ssl/OSKeyStore.cpp b/security/manager/ssl/OSKeyStore.cpp
+index 00bc918c5fdd..c83a559d9c1e 100644
+--- a/security/manager/ssl/OSKeyStore.cpp
++++ b/security/manager/ssl/OSKeyStore.cpp
+@@ -663,6 +663,7 @@ nsresult AbstractOSKeyStore::DoCipher(const UniquePK11SymKey& aSymKey,
+   CK_GCM_PARAMS gcm_params;
+   gcm_params.pIv = const_cast<unsigned char*>(ivp);
+   gcm_params.ulIvLen = mIVLength;
++  gcm_params.ulIvBits = gcm_params.ulIvLen * 8;
+   gcm_params.ulTagBits = 128;
+   gcm_params.pAAD = nullptr;
+   gcm_params.ulAADLen = 0;
+diff --git a/third_party/prio/moz.build b/third_party/prio/moz.build
+index 3e10fe71ce8e..0a6e3c74a269 100644
+--- a/third_party/prio/moz.build
++++ b/third_party/prio/moz.build
+@@ -42,3 +42,8 @@ SOURCES += [
+ ]
+ 
+ FINAL_LIBRARY = 'xul'
++
++# Use PKCS11 v2 struct definitions for now, otherwise NSS requires
++# CK_GCM_PARAMS.ulIvBits to be set. This workaround is only required
++# until NSS 3.52 RTM and upstream correctly initializes the field.
++DEFINES['NSS_PKCS11_2_0_COMPAT'] = True
+-- 
+2.26.2
+
diff --git a/network/web/firefox/pspec.xml b/network/web/firefox/pspec.xml
index 3eb82bc791..621f1b70f8 100644
--- a/network/web/firefox/pspec.xml
+++ b/network/web/firefox/pspec.xml
@@ -15,7 +15,7 @@
         <IsA>app:gui</IsA>
         <Summary>Firefox Web Browser</Summary>
         <Description>It is more secure and faster to browse the web with Firefox web browser. You can personalize your web browser with many specifications that is not enough to explain in two sentences.</Description>
-        <Archive sha1sum="49e664ec6ece360c712ab8afb75df6f9fd73e421" type="tarxz">https://ftp.mozilla.org/pub/firefox/releases/76.0/source/firefox-76.0.source.tar.xz</Archive>
+        <Archive sha1sum="7713e5e25b9ae1344f2f3dbbb6cd49c147ed73c0" type="tarxz">https://ftp.mozilla.org/pub/firefox/releases/76.0.1/source/firefox-76.0.1.source.tar.xz</Archive>
         <AdditionalFiles>
             <!--Our main configure script. Configure paramters are stored here.-->
             <AdditionalFile target=".mozconfig" permission="0644">mozconfig</AdditionalFile>
@@ -66,7 +66,7 @@
             <Dependency>gdb-devel</Dependency>
         </BuildDependencies>
         <Patches>
-<!--             <Patch level="1">0001-bz-1521249.patch</Patch> -->
+            <Patch level="1">0001-Bug-1624128-Update-CK_GCM_PARAMS-uses-for-PKCS11-v3..patch</Patch>
         </Patches>
     </Source>
 
@@ -550,6 +550,13 @@
     </Package>
 
     <History>
+        <Update release="40">
+            <Date>2020-05-12</Date>
+            <Version>76.0.1</Version>
+            <Comment>Version bump.</Comment>
+            <Name>Mustafa Cinasal</Name>
+            <Email>muscnsl@gmail.com</Email>
+        </Update>
         <Update release="39">
             <Date>2020-05-05</Date>
             <Version>76.0</Version>