diff --git a/thunderbird.spec b/thunderbird.spec
index b3f8ead..019d631 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -9,7 +9,7 @@
 #%define        source_dir                  comm-esr%(echo %version | cut -d. -f1)
 
 Name:          thunderbird
-Version:       78.10.0
+Version:       78.10.1
 Release:       1mamba
 Summary:       Mozilla Thunderbird email, RSS, and newsgroup client
 Group:         Graphical Desktop/Applications/Internet
@@ -28,7 +28,7 @@ Patch14:       thunderbird-78.8.1-rust-1.48.patch
 Patch15:       thunderbird-78.8.1-fix-passing-system-bzip2-ldflags.patch
 License:       GPL,MPL 1.1,LGPL
 ## AUTOBUILDREQ-BEGIN
-BuildRequires: xulrunner-devel
+BuildRequires: firefox-devel
 BuildRequires: glibc-devel
 BuildRequires: libX11-devel
 BuildRequires: libXcomposite-devel
@@ -198,8 +198,9 @@ This package contains the %{2} language support files for Thunderbird.\
 #% debug_package
 
 %prep
-%setup -q -D -T
-:<< ___EOF
+%setup -q
+#-D -T
+#:<< ___EOF
 %global __provides_exclude_from ^%{_libdir}/thunderbird/.*$
 %global __requires_exclude ^(libxul\\.so.*|libldap.*\\.so.*|libldif.*\\.so.*|libmoz.*\\.so.*|libprldap.*\\.so.*)$
 
@@ -442,6 +443,9 @@ fi
 %{tbdir}/removed-files
 
 %changelog
+* Tue May 11 2021 Automatic Build System <autodist@mambasoft.it> 78.10.1-1mamba
+- automatic version update by autodist
+
 * Thu Apr 29 2021 Automatic Build System <autodist@mambasoft.it> 78.10.0-1mamba
 - automatic version update by autodist