diff --git a/SOURCES/Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch b/SOURCES/Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch
new file mode 100644
index 0000000..6dfe2ad
--- /dev/null
+++ b/SOURCES/Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch
@@ -0,0 +1,12 @@
+diff -up firefox-60.0/mfbt/LinuxSignal.h.mozilla-1238661 firefox-60.0/mfbt/LinuxSignal.h
+--- firefox-60.0/mfbt/LinuxSignal.h.mozilla-1238661	2018-04-27 08:55:38.848241768 +0200
++++ firefox-60.0/mfbt/LinuxSignal.h	2018-04-27 09:06:47.946769859 +0200
+@@ -22,7 +22,7 @@ __attribute__((naked)) void SignalTrampo
+                                              void* aContext) {
+   asm volatile("nop; nop; nop; nop" : : : "memory");
+ 
+-  asm volatile("b %0" : : "X"(H) : "memory");
++  asm volatile("bx %0" : : "r"(H), "l"(aSignal), "l"(aInfo), "l"(aContext) : "memory");
+ }
+ 
+ #  define MOZ_SIGNAL_TRAMPOLINE(h) (mozilla::SignalTrampoline<h>)
diff --git a/SOURCES/Bug-1526653---fix_user_vfp_armv7.patch b/SOURCES/Bug-1526653---fix_user_vfp_armv7.patch
new file mode 100644
index 0000000..3f84f95
--- /dev/null
+++ b/SOURCES/Bug-1526653---fix_user_vfp_armv7.patch
@@ -0,0 +1,35 @@
+From fd6847c9416f9eebde636e21d794d25d1be8791d Mon Sep 17 00:00:00 2001
+From: Mike Hommey <mh@glandium.org>
+Date: Sat, 1 Jun 2019 09:06:01 +0900
+Subject: [PATCH] Bug 1526653 - Include struct definitions for user_vfp and
+ user_vfp_exc.
+
+---
+ js/src/wasm/WasmSignalHandlers.cpp | 11 ++++++++++-
+ 1 file changed, 10 insertions(+), 1 deletion(-)
+
+diff --git a/js/src/wasm/WasmSignalHandlers.cpp b/js/src/wasm/WasmSignalHandlers.cpp
+index 636537f8478..383c380f04c 100644
+--- a/js/src/wasm/WasmSignalHandlers.cpp
++++ b/js/src/wasm/WasmSignalHandlers.cpp
+@@ -248,7 +248,16 @@ using mozilla::DebugOnly;
+ #endif
+ 
+ #ifdef WASM_EMULATE_ARM_UNALIGNED_FP_ACCESS
+-#  include <sys/user.h>
++struct user_vfp {
++  unsigned long long fpregs[32];
++  unsigned long fpscr;
++};
++
++struct user_vfp_exc {
++  unsigned long fpexc;
++  unsigned long fpinst;
++  unsigned long fpinst2;
++};
+ #endif
+ 
+ #if defined(ANDROID)
+-- 
+2.20.1
+
diff --git a/SOURCES/thunderbird-centos-default-prefs.js.el6 b/SOURCES/thunderbird-centos-default-prefs.js.el6
new file mode 100644
index 0000000..a277f3d
--- /dev/null
+++ b/SOURCES/thunderbird-centos-default-prefs.js.el6
@@ -0,0 +1,33 @@
+pref("app.update.enabled", false);
+pref("app.update.autoInstallEnabled", false);
+# Allow users to set custom colors
+# pref("browser.display.use_system_colors",   true);
+pref("general.useragent.vendor", "CentOS");
+pref("general.useragent.vendorSub", "THUNDERBIRD_RPM_VR");
+pref("intl.locale.matchOS", true);
+pref("mail.shell.checkDefaultClient", false);
+pref("toolkit.networkmanager.disable", false);
+pref("offline.autoDetect", true);
+
+# Disable global indexing by default
+pref("mailnews.database.global.indexer.enabled", false);
+
+# Do not switch to Smart Folders after upgrade to 3.0b4
+pref("mail.folder.views.version", "1");
+pref("extensions.shownSelectionUI", true);
+pref("extensions.autoDisableScope", 0);
+
+# For rhbz#1024232
+pref("ui.SpellCheckerUnderlineStyle",       1);
+
+/* Workaround for rhbz#1134876 */
+pref("javascript.options.baselinejit",      false);
+/* Workaround for rhbz#1110291 */
+pref("network.negotiate-auth.allow-insecure-ntlm-v1", true);
+/* Workaround for mozbz#1063315 */
+pref("security.use_mozillapkix_verification", false);
+/* Use OS settings for UI language */
+pref("intl.locale.requested", "");
+pref("datareporting.healthreport.uploadEnabled", false);
+pref("datareporting.policy.dataSubmissionEnabled", false);
+pref("toolkit.telemetry.archive.enabled", false);
diff --git a/SOURCES/thunderbird-centos-default-prefs.js.el7 b/SOURCES/thunderbird-centos-default-prefs.js.el7
new file mode 100644
index 0000000..a277f3d
--- /dev/null
+++ b/SOURCES/thunderbird-centos-default-prefs.js.el7
@@ -0,0 +1,33 @@
+pref("app.update.enabled", false);
+pref("app.update.autoInstallEnabled", false);
+# Allow users to set custom colors
+# pref("browser.display.use_system_colors",   true);
+pref("general.useragent.vendor", "CentOS");
+pref("general.useragent.vendorSub", "THUNDERBIRD_RPM_VR");
+pref("intl.locale.matchOS", true);
+pref("mail.shell.checkDefaultClient", false);
+pref("toolkit.networkmanager.disable", false);
+pref("offline.autoDetect", true);
+
+# Disable global indexing by default
+pref("mailnews.database.global.indexer.enabled", false);
+
+# Do not switch to Smart Folders after upgrade to 3.0b4
+pref("mail.folder.views.version", "1");
+pref("extensions.shownSelectionUI", true);
+pref("extensions.autoDisableScope", 0);
+
+# For rhbz#1024232
+pref("ui.SpellCheckerUnderlineStyle",       1);
+
+/* Workaround for rhbz#1134876 */
+pref("javascript.options.baselinejit",      false);
+/* Workaround for rhbz#1110291 */
+pref("network.negotiate-auth.allow-insecure-ntlm-v1", true);
+/* Workaround for mozbz#1063315 */
+pref("security.use_mozillapkix_verification", false);
+/* Use OS settings for UI language */
+pref("intl.locale.requested", "");
+pref("datareporting.healthreport.uploadEnabled", false);
+pref("datareporting.policy.dataSubmissionEnabled", false);
+pref("toolkit.telemetry.archive.enabled", false);
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index 8bb99ec..211431e 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -231,8 +231,8 @@ Source301:      yasm-1.2.0-3.el5.src.rpm
 Source303:      libffi-3.0.13-18.el7_3.src.rpm
 Source304:      nodejs-10.21.0-5.fc32.src.rpm
 Source305:      openssl-1.0.2k-19.6.bundle.el7_7.src.rpm
-Source601:      thunderbird-redhat-default-prefs.js.rhel6
-Source701:      thunderbird-redhat-default-prefs.js.rhel7
+Source601:      thunderbird-centos-default-prefs.js.el6
+Source701:      thunderbird-centos-default-prefs.js.el7
 
 ## Firefox patches