diff --git a/download b/download
index 2b251a43f67a42936913d3f9ea086d7e3707224b..84ee633c8a0789498ad28848b1054f6667bad6f4 100644
--- a/download
+++ b/download
@@ -1,5 +1,5 @@
-9030c1f285ee079a4c386e525e57a2b1 cbindgen-vendor.tar.xz
-a130eff8558c46cad9d5ad957ec16a7b firefox-91.7.0esr.processed-source.tar.xz
-499f3d8cf3e7ca16a61bda6e49cbf4fc firefox-langpacks-91.7.0esr-20220307.tar.xz
-5b7e3326f4484ce1ab685e74f8477a26 nspr-4.32.0-1.el8_1.src.rpm
-770fbbfb259e656b8f3879934137d10c nss-3.67.0-7.el8_1.src.rpm
+9030c1f285ee079a4c386e525e57a2b1  cbindgen-vendor.tar.xz
+a135ed443e0a90b552880362975feefa  firefox-91.9.1esr.processed-source.tar.xz
+e3c6397907f2e5bb1ac5948acf01495c  firefox-langpacks-91.9.1esr-20220520.tar.xz
+5b7e3326f4484ce1ab685e74f8477a26  nspr-4.32.0-1.el8_1.src.rpm
+770fbbfb259e656b8f3879934137d10c  nss-3.67.0-7.el8_1.src.rpm
diff --git a/firefox.spec b/firefox.spec
index 2c72eade09fc03004ec7552b9ed92be6382c4871..9ebe5d25dfbb59964fff33e14ddf2d014b00f687 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -19,7 +19,7 @@ function dist_to_rhel_minor(str, start)
   end
   match = string.match(str, ".an8")
   if match then
-     return 6
+     return 7
   end
   return -1
 end}
@@ -127,10 +127,17 @@ end}
 %global official_branding       1
 %global build_langpacks         1
 
+# Workaround the dreaded "upstream source file changed content" rpmdiff failure that only secalert can waive.
+# If set to .b2 or .b3 ... the processed source file needs to be renamed before upload, e.g.
+# firefox-91.9.0esr.b2.processed-source.tar.xz
+# With does_not_exist it's empty and source file name as is.
+#global buildnum %{?does_not_exist}
+%global buildnum %{?does_not_exist}
+
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
-Version:        91.7.0
-Release:        3%{anolis_release}%{?dist}
+Version:        91.9.1
+Release:        1%{anolis_release}%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 %if 0%{?rhel} == 9
@@ -152,9 +159,9 @@ ExcludeArch:    aarch64 s390 ppc
 # The official tarball has to be always processed by the process-official-tarball
 # script.
 # Link to official tarball: https://hg.mozilla.org/releases/mozilla-release/archive/firefox-%%{version}%%{?pre_version}.source.tar.xz
-Source0:        firefox-%{version}%{?pre_version}.processed-source.tar.xz
+Source0:        firefox-%{version}%{?pre_version}%{?buildnum}.processed-source.tar.xz
 %if %{build_langpacks}
-Source1:        firefox-langpacks-%{version}%{?pre_version}-20220307.tar.xz
+Source1:        firefox-langpacks-%{version}%{?pre_version}-20220520.tar.xz
 
 %endif
 Source2:        cbindgen-vendor.tar.xz
@@ -430,8 +437,8 @@ echo "use_rustts            %{?use_rustts}"
 %patch219 -p1 -b .rhbz-1173156
 %patch224 -p1 -b .1170092
 
-# the nss changed in 8.6 and later, so addons are working in older releases
-%if 0%{?rhel_minor_version} >= 6
+# Enable workaround for RHEL >= 8: rhbz#2043303
+%if 0%{?rhel} == 8 || 0%{?rhel} >= 9
 %patch225 -p1 -b .firefox-nss-addon-hack
 %endif
 
@@ -1260,10 +1267,19 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
-* Fri Mar 11 2022 Liwei Ge <geliwei@openanolis.org> - 91.7.0-3.0.1
+* Sat May 28 2022 Liwei Ge <geliwei@openanolis.org> - 91.9.1-1.0.1
 - Add firefox-anolis-default-prefs.js
 - Remove bookmarks
 
+* Fri May 20 2022 Jan Horak <jhorak@redhat.com> - 91.9.1-1
+- Update to 91.9.1 build1
+
+* Tue Apr 26 2022 Eike Rathke <erack@redhat.com> - 91.9.0-1
+- Update to 91.9.0
+
+* Tue Apr 05 2022 Eike Rathke <erack@redhat.com> - 91.8.0-1
+- Update to 91.8.0
+
 * Mon Mar 07 2022 Eike Rathke <erack@redhat.com> - 91.7.0-3
 - Update to 91.7.0 build3