diff --git a/.gitignore b/.gitignore
index 45ac021..e6e2812 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 SOURCES/cbindgen-vendor.tar.xz
 SOURCES/nspr-4.32.0-1.el8_1.src.rpm
 SOURCES/nss-3.67.0-7.el8_1.src.rpm
-SOURCES/thunderbird-91.10.0.processed-source.tar.xz
-SOURCES/thunderbird-langpacks-91.10.0-20220530.tar.xz
+SOURCES/thunderbird-91.12.0.processed-source.tar.xz
+SOURCES/thunderbird-langpacks-91.12.0-20220725.tar.xz
diff --git a/.thunderbird.metadata b/.thunderbird.metadata
index 9fe2363..fbdb5bb 100644
--- a/.thunderbird.metadata
+++ b/.thunderbird.metadata
@@ -1,5 +1,5 @@
 c822547dbc12e2baebdfdfb38b665e23f0c2513a SOURCES/cbindgen-vendor.tar.xz
 b5fd1332d8e0d37339ae170c7bebcb63a40b22e0 SOURCES/nspr-4.32.0-1.el8_1.src.rpm
 8fff814901e03c2518ede2f8992d898f5ba61ed9 SOURCES/nss-3.67.0-7.el8_1.src.rpm
-3ad159989de51587768618bd07f3f076f51202dc SOURCES/thunderbird-91.10.0.processed-source.tar.xz
-51bd5b9f0aaeab733e6b88387a64870602d8a154 SOURCES/thunderbird-langpacks-91.10.0-20220530.tar.xz
+e200f143a28a7f7d5759a06ae11e52aec7a896a4 SOURCES/thunderbird-91.12.0.processed-source.tar.xz
+992480ecc2d5671a883758677d44d3ec6ff04d42 SOURCES/thunderbird-langpacks-91.12.0-20220725.tar.xz
diff --git a/README.debrand b/README.debrand
deleted file mode 100644
index 01c46d2..0000000
--- a/README.debrand
+++ /dev/null
@@ -1,2 +0,0 @@
-Warning: This package was configured for automatic debranding, but the changes
-failed to apply.
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index f13a77c..b53839a 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -130,13 +130,12 @@ end}
 # 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.
 # thunderbird-91.9.0.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}
+# When unset use processed source file name as is.
+#global buildnum .b2
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        91.10.0
+Version:        91.12.0
 Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
@@ -163,7 +162,7 @@ ExcludeArch:    aarch64 s390 ppc
 # Link to official tarball: https://archive.mozilla.org/pub/thunderbird/releases/%%{version}%%{?pre_version}/source/thunderbird-%%{version}%%{?pre_version}.source.tar.xz
 Source0:        thunderbird-%{version}%{?pre_version}%{?buildnum}.processed-source.tar.xz
 %if %{build_langpacks}
-Source1:        thunderbird-langpacks-%{version}%{?ext_version}-20220530.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?ext_version}-20220725.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        get-calendar-langpacks.sh
@@ -1132,8 +1131,14 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
-* Tue Jun 21 2022 CentOS Sources <bugs@centos.org> - 91.10.0-1.el8.centos
-- Apply debranding changes
+* Mon Jul 25 2022 Eike Rathke <erack@redhat.com> - 91.12.0-1
+- Update to 91.12.0 build1
+
+* Tue Jun 28 2022 Eike Rathke <erack@redhat.com> - 91.11.0-2
+- Update to 91.11.0 build2
+
+* Thu Jun 23 2022 Eike Rathke <erack@redhat.com> - 91.11.0-1
+- Update to 91.11.0 build1
 
 * Mon May 30 2022 Eike Rathke <erack@redhat.com> - 91.10.0-1
 - Update to 91.10.0 build1