diff --git a/.gitignore b/.gitignore
index eb72886..17b2d93 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,5 @@ SOURCES/cbindgen-vendor.tar.xz
 SOURCES/nspr-4.35.0-1.el8_1.src.rpm
 SOURCES/nss-3.101.0-7.el8_2.src.rpm
 SOURCES/nss-3.101.0-7.el9_2.src.rpm
-SOURCES/thunderbird-128.9.2esr.processed-source.tar.xz
-SOURCES/thunderbird-langpacks-128.9.2esr-20250416.tar.xz
+SOURCES/thunderbird-128.10.0esr.processed-source.tar.xz
+SOURCES/thunderbird-langpacks-128.10.0esr-20250428.tar.xz
diff --git a/.thunderbird.metadata b/.thunderbird.metadata
index 3e2a231..1c7bf1c 100644
--- a/.thunderbird.metadata
+++ b/.thunderbird.metadata
@@ -2,5 +2,5 @@
 d744f92e874688cc4b5376477dfdd639a97a6cd4 SOURCES/nspr-4.35.0-1.el8_1.src.rpm
 f466d7213e85773e002c48897524eaf909480046 SOURCES/nss-3.101.0-7.el8_2.src.rpm
 0413d22a58ba1bba99acec9c3c2a4db56a4100c7 SOURCES/nss-3.101.0-7.el9_2.src.rpm
-04750755e303eeb56eed41a9a31bdab359973f5d SOURCES/thunderbird-128.9.2esr.processed-source.tar.xz
-3d02dadbaeb5e79cd69b4a6160440378d3b84402 SOURCES/thunderbird-langpacks-128.9.2esr-20250416.tar.xz
+c32d35afb300a89e0c702e1db5e923565f5c3989 SOURCES/thunderbird-128.10.0esr.processed-source.tar.xz
+9ad46c67f8e7458fac79ce6003a0b582fe606136 SOURCES/thunderbird-langpacks-128.10.0esr-20250428.tar.xz
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index e86c9c4..56b49ad 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -35,7 +35,7 @@ function dist_to_rhel_minor(str, start)
   end
   match = string.match(str, ".el9")
   if match then
-     return 6
+     return 7
   end
   match = string.match(str, ".el10_%d+")
   if match then
@@ -43,7 +43,7 @@ function dist_to_rhel_minor(str, start)
   end
   match = string.match(str, ".el10")
   if match then
-     return 0
+     return 1
   end
   return -1
 end}
@@ -88,7 +88,7 @@ end}
 
 %if 0%{?rhel} > 7 && 0%{?rhel} < 10
   %global use_gcc_ts      1
-  %if 0%{?rhel} == 9 && %{rhel_minor_version} >= 6
+  %if (0%{?rhel} == 9 && %{rhel_minor_version} >= 6) || (0%{?rhel} == 8 && %{rhel_minor_version} >= 10)
     # clang depends on gcc-toolset-14-gcc-c++
     %global gts_version 14
   %else
@@ -137,7 +137,7 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        128.9.2
+Version:        128.10.0
 Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
@@ -165,7 +165,7 @@ ExcludeArch:    %{ix86}
 #Source0:        https://archive.mozilla.org/pub/thunderbird/releases/%%{version}%%{?pre_version}/source/thunderbird-%%{version}%%{?pre_version}.processed-source.tar.xz
 Source0:        thunderbird-%{version}%{?pre_version}%{?buildnum}.processed-source.tar.xz
 %if %{with langpacks}
-Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20250416.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20250428.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -333,8 +333,9 @@ BuildRequires: gcc-toolset-%{gts_version}-runtime
 BuildRequires: gcc-toolset-%{gts_version}-binutils
 BuildRequires: gcc-toolset-%{gts_version}-gcc
 BuildRequires: gcc-toolset-%{gts_version}-gcc-plugin-annobin
-# Do not explicitly require gcc-toolset-%%{gts_version}-gcc-g++ instead fail
+# Do not explicitly require gcc-toolset-%%{gts_version}-gcc-c++ instead fail
 # when clang is upgraded to depend on a later toolset and adjust version.
+# ERROR: The target C compiler is version 13.3.1, while the target C++ compiler is version 8.5.0. Need to use the same compiler version.
 %endif
 
 %if %{?use_openssl_for_librnp}
@@ -1658,6 +1659,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon Apr 28 2025 Eike Rathke <erack@redhat.com> - 128.10.0-1
+- Update to 128.10.0 build1
+
 * Wed Apr 16 2025 Eike Rathke <erack@redhat.com> - 128.9.2-1
 - Update to 128.9.2