diff --git a/.gitignore b/.gitignore
index 2d2ef6d..54fe2cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -375,3 +375,5 @@
 /firefox-langpacks-128.8.0esr-20250224.tar.xz
 /firefox-128.9.0esr.processed-source.tar.xz
 /firefox-langpacks-128.9.0esr-20250325.tar.xz
+/firefox-128.9.0esr.b2.processed-source.tar.xz
+/firefox-langpacks-128.9.0esr-20250331.tar.xz
diff --git a/firefox.spec b/firefox.spec
index 878a191..825a70e 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -156,7 +156,7 @@ end}
 # 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
 
 %bcond_without langpacks
 
@@ -167,7 +167,7 @@ end}
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        128.9.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 
@@ -197,7 +197,7 @@ 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}-20250325.tar.xz
+Source1:        firefox-langpacks-%{version}%{?pre_version}-20250331.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1988,6 +1988,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Mon Mar 31 2025 Eike Rathke <erack@redhat.com> - 128.9.0-2
+- Update to 128.9.0 build2
+
 * Tue Mar 25 2025 Eike Rathke <erack@redhat.com> - 128.9.0-1
 - Update to 128.9.0 build1
 
diff --git a/sources b/sources
index 7b6ad79..4154506 100644
--- a/sources
+++ b/sources
@@ -4,5 +4,5 @@ SHA512 (nspr-4.35.0-1.el8_1.src.rpm) = 5123a443fcc42602e31104999be339ae899eb7b1f
 SHA512 (nss-3.101.0-7.el9_2.src.rpm) = 7c325e0e437c1266031af02b3a026d20b789548ae435be6c39d710aa9d19c967ac0a79097fd50dd8ab878bf0d72c19e937d54863aa8cd0654ef2ef288e3102ec
 SHA512 (nss-3.101.0-7.el8_2.src.rpm) = c25551b06cf9239bb54aaf3edaea2c60804b449de4e06af4f5192bc181b5c6468ea8a69ddeff9de1b11bfc123e894b1ce8fc5d6deddfd5062f8736b75db56f8d
 SHA512 (wasi-sdk-20.tar.gz) = 95be9d9b41ed1f7884e9cd68bad22abbb355b049fd09731c89b9e36666d0205b1a16ec9c21820adf0c5a34e2048015cbfbef0542170d466fa3336c636873c405
-SHA512 (firefox-128.9.0esr.processed-source.tar.xz) = 43d99de66bbafe278363ce0f4c5db7b45dcb8ddf5f4abffe9b4423dd5d718d91a7b8295c36b4411304c750d20f049a7dfb32a9c1abfa2129637a4315e0fda4b7
-SHA512 (firefox-langpacks-128.9.0esr-20250325.tar.xz) = e2965edc9aba7cd22566a0e442fd4b08082d7e2f4a4068f7ef853e55903d4a1c48a3a9156b0fcf4d6f1b867df5513c1f5bf4ab4aa9972eaae1573525df8c7b0a
+SHA512 (firefox-128.9.0esr.b2.processed-source.tar.xz) = 4b3ebe44b5b2b2cd4b1aca8bb3f4690e60be14b5d9fb682cedb24d425d062988752d169bd2d0aead299422f803eb3c52e97f8ce8512ae0910259f78e11d0f7cf
+SHA512 (firefox-langpacks-128.9.0esr-20250331.tar.xz) = ee306c9c112fcfd56a90adcffbcdddca5a42c7e193a7d32c3921c52a44b2ddeff1579384befc96c2afa97f8b5b1d098d0f4a27edbc662a618c15b1569b08b24b