diff --git a/.gitignore b/.gitignore
index ffae214..e5c3d6e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -294,3 +294,5 @@
 /firefox-langpacks-102.11.0esr-20230502.tar.xz
 /firefox-102.11.0esr.b2.processed-source.tar.xz
 /firefox-langpacks-102.11.0esr-20230504.tar.xz
+/firefox-102.12.0esr.processed-source.tar.xz
+/firefox-langpacks-102.12.0esr-20230531.tar.xz
diff --git a/firefox.spec b/firefox.spec
index 50bc09c..8706a6a 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -218,8 +218,8 @@ end}
 
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
-Version:        102.11.0
-Release:        2%{?dist}
+Version:        102.12.0
+Release:        1%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 
@@ -227,7 +227,7 @@ License:        MPLv1.1 or GPLv2+ or LGPLv2+
 # If set to .b2 or .b3 ... the processed source file needs to be renamed before upload, e.g.
 # firefox-102.8.0esr.b2.processed-source.tar.xz
 # When unset use processed source file name as is.
-%global buildnum .b2
+#%%global buildnum .b2
 
 %if 0%{?rhel} == 9
 ExcludeArch:    %{ix86}
@@ -249,7 +249,7 @@ ExcludeArch:    aarch64 s390 ppc
 # Link to original tarball: https://archive.mozilla.org/pub/firefox/releases/%{version}%{?pre_version}/source/firefox-%{version}%{?pre_version}.source.tar.xz
 Source0:        firefox-%{version}%{?pre_version}%{?buildnum}.processed-source.tar.xz
 %if %{with langpacks}
-Source1:        firefox-langpacks-%{version}%{?pre_version}-20230504.tar.xz
+Source1:        firefox-langpacks-%{version}%{?pre_version}-20230531.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1489,6 +1489,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Wed May 31 2023 Eike Rathke <erack@redhat.com> - 102.12.0-1
+- Update to 102.12.0 build1
+
 * Tue May 23 2023 Anton Bobrov <abobrov@redhat.com> 102.11.0-2
 - Do not import cert to certdb on override exception:
   rhbz#2118991
diff --git a/sources b/sources
index d870b97..445e5bc 100644
--- a/sources
+++ b/sources
@@ -1,5 +1,5 @@
 SHA512 (cbindgen-vendor.tar.xz) = ba8967007c7545fcf62a392e745b19188d883428adb5e9abd102cc6ad5d50891e9d38a7a20ee7a91e99d6340e9490a6b8bcc4c7175f3bb3a698841b816966385
 SHA512 (nspr-4.34.0-3.el8_1.src.rpm) = fe4715694c297cd8cefa577946358a90103bde73e78a3fdf13d202a3791736e8a48fbece09ee3d15f6d81ae051e26d96400b03bb6bf8630715746c5e1a643543
 SHA512 (nss-3.79.0-11.el8_1.src.rpm) = c4516e7917a45ac2d401700b6a7e23d5942d62fe2307cf130c526eea5a924516f82c2d2426b919c89004c4466c78061ea050721c1889a01fcd436cb562d4b1bd
-SHA512 (firefox-102.11.0esr.b2.processed-source.tar.xz) = aa582beb59731b0cf3793e13e753969cb2d6ad6a1ca568ddef10caa00e7d8d7271fb6a399d325ec24b886bd9ab54ec3758d0373e505b1d12b1acf386f6d73e6d
-SHA512 (firefox-langpacks-102.11.0esr-20230504.tar.xz) = e694f824af2db68f97062149b5c82ea0362a98568079e47f5f3eec892c0def8b10a9ad6028f794a921f2ab0c4432abbe0f1f93d3b1c16bafdfca983076b735d2
+SHA512 (firefox-102.12.0esr.processed-source.tar.xz) = 5d87977e171a4b38b8c4cdd1285ef700ca17b4b54272ed5f71cc1c9cb035493eeac3bd1b71c5463d2689ba2b6f331c557d3418a446566c3877992ff1409d79ac
+SHA512 (firefox-langpacks-102.12.0esr-20230531.tar.xz) = 90491a051b1da2ca4c66fe112463134a765045900b9943b36dd6470a6094c25c36fed6fe4f6d191b9756968c628c463fbe2f93efdfff41036b4ffdde254ac906