diff --git a/.gitignore b/.gitignore
index bdb1a9b..baf97b2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -268,3 +268,5 @@
 /firefox-langpacks-78.11.0esr-20210525.tar.xz
 /firefox-78.11.0esr.source.tar.xz
 /firefox-langpacks-78.11.0esr-20210531.tar.xz
+/firefox-langpacks-78.12.0esr-20210707.tar.xz
+/firefox-78.12.0esr.source.tar.xz
diff --git a/firefox.spec b/firefox.spec
index c2d59ab..407f6c1 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -197,8 +197,8 @@ end}
 
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
-Version:        78.11.0
-Release:        4%{?dist}
+Version:        78.12.0
+Release:        1%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 %if 0%{?rhel} == 7
@@ -207,7 +207,7 @@ ExcludeArch:    s390 ppc
 
 Source0:        https://hg.mozilla.org/releases/mozilla-release/archive/firefox-%{version}%{?pre_version}.source.tar.xz
 %if %{build_langpacks}
-Source1:        firefox-langpacks-%{version}%{?pre_version}-20210531.tar.xz
+Source1:        firefox-langpacks-%{version}%{?pre_version}-20210707.tar.xz
 %endif
 Source2:        cbindgen-vendor-0.14.3.tar.xz
 Source10:       firefox-mozconfig
@@ -1645,6 +1645,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Wed Jul 07 2021 Eike Rathke <erack@redhat.com> - 78.12.0-1
+- Update to 78.12.0 build1
+
 * Tue Jun 29 2021 Jan Horak <jhorak@redhat.com> - 78.11.0-4
 - Added bundled librarie
 
diff --git a/sources b/sources
index febee17..73f60dc 100644
--- a/sources
+++ b/sources
@@ -8,5 +8,5 @@ SHA512 (nspr-4.25.0-1.el8_0.src.rpm) = 7e39e4484b0d504e1b7f1253d7dc1f9f0d45705fb
 SHA512 (cbindgen-vendor-0.14.3.tar.xz) = 33c8d28547674121f690eea0d3ebac33926a39caacac787bf8ed8b346478822e74da5a4a1f57ab4df4105fa8376739a2ece888845a85bc5712aaed20e4a508bc
 SHA512 (nss-3.53.1-3.fc32.src.rpm) = 368849487aa8f9d602c9e5d9d7c88ebd03318aece12470283ff31744ef9eed27ef1e32031378a5a673bb06a9ebbcf5542afa13f3ad465409449c218922189acb
 SHA512 (nodejs-10.21.0-5.fc32.src.rpm) = 4d0c212a2609dc10e242a96f63baa8babb91e8aa6696f66f627c562c1ba30cb3632ed01991c98f48b5942fc7fd89ee34b350f41de901339b49a2c19e979593a7
-SHA512 (firefox-langpacks-78.11.0esr-20210531.tar.xz) = 555cbbf7c59e05a731c3e10ad22cb41d5f8e25fbae1b64146c74bb26a675c137bf2c6ac7578a693fecec019df29f8adc5630971a57909e0ed8a189ae4a214712
-SHA512 (firefox-78.11.0esr.source.tar.xz) = d02fc2eda587155b1c54ca12a6c5cde220a29f41f154f1c9b71ae8f966d8cc9439201a5b241e03fc0795b74e2479f7aa5d6b69f70b7639432e5382f321f7a6f4
+SHA512 (firefox-langpacks-78.12.0esr-20210707.tar.xz) = 2c5a88cab108bba707fd10183b2853e20450c206180a8d12f6b6f850fd35913996fb866c8736279bc4c4fd639cdb0fe7f409784be900e61d226ac9e429ce69fc
+SHA512 (firefox-78.12.0esr.source.tar.xz) = 646eb803e0d0e541773e3111708c7eaa85e784e4bae6e4a77dcecdc617ee29e2e349c9ef16ae7e663311734dd7491aebd904359124dda62672dbc18bfb608f0a