diff --git a/thunderbird.spec b/thunderbird.spec
index 4bdf15c..7a8a2b0 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -9,7 +9,7 @@
 #%define        source_dir                  comm-esr%(echo %version | cut -d. -f1)
 
 Name:          thunderbird
-Version:       78.12.0
+Version:       91.3.2
 Release:       1mamba
 Summary:       Mozilla Thunderbird email, RSS, and newsgroup client
 Group:         Graphical Desktop/Applications/Internet
@@ -52,7 +52,6 @@ BuildRequires: libfreetype-devel
 BuildRequires: libgcc
 BuildRequires: libgdk-pixbuf-devel
 BuildRequires: libglib-devel
-BuildRequires: libgtk2-devel
 BuildRequires: libgtk3-devel
 BuildRequires: libharfbuzz-devel
 BuildRequires: libicu-devel
@@ -82,7 +81,7 @@ BuildRequires: libxcb-util-devel
 BuildRequires: libXft-devel
 BuildRequires: libXinerama-devel
 BuildRequires: libxml2-devel
-BuildRequires: perl-Gtk2
+#BuildRequires: perl-Gtk2
 BuildRequires: pkgconfig
 BuildRequires: unzip
 BuildRequires: xorg-proto-devel
@@ -145,7 +144,7 @@ This package contains the %{2} language support files for Thunderbird.\
 %lang_subpkg es-ES Spanish
 %lang_subpkg et Estonian
 %lang_subpkg eu Basque
-%lang_subpkg fa %{quote:Persian - Farsi (IR)}
+#% lang_subpkg fa %{quote:Persian - Farsi (IR)}
 %lang_subpkg fi Finnish
 %lang_subpkg fr French
 %lang_subpkg fy-NL Frisian
@@ -166,6 +165,7 @@ This package contains the %{2} language support files for Thunderbird.\
 %lang_subpkg kk %{quote:Kazakh (KZ)}
 %lang_subpkg ko Korean
 %lang_subpkg lt Lithuanian
+%lang_subpkg lv Latvian
 #% lang_subpkg mk Macedonian
 %lang_subpkg ms Malay
 %lang_subpkg nb-NO %{quote:Norwegian Bokmål}
@@ -178,7 +178,7 @@ This package contains the %{2} language support files for Thunderbird.\
 %lang_subpkg rm Rumantsch
 %lang_subpkg ro Romanian
 %lang_subpkg ru Russian
-%lang_subpkg si %{quote:Sinhala (si-LK)}
+#% lang_subpkg si %{quote:Sinhala (si-LK)}
 %lang_subpkg sk Slovak
 %lang_subpkg sl Slovenian
 %lang_subpkg sq Albanian
@@ -220,7 +220,9 @@ ac_add_options --enable-optimize
 # https://bugzilla.mozilla.org/show_bug.cgi?id=1521249
 ac_add_options --enable-rust-simd
 # https://bugzilla.mozilla.org/show_bug.cgi?id=1423822
+%ifarch %{ix86} x86_64
 ac_add_options --disable-elf-hack
+%endif
 
 # Branding
 ac_add_options --enable-official-branding
@@ -246,7 +248,7 @@ ac_add_options --enable-system-pixman
 # Features
 ac_add_options --enable-alsa
 ac_add_options --enable-openpgp
-ac_add_options --enable-calendar
+#ac_add_options --enable-calendar
 ac_add_options --disable-jack
 ac_add_options --disable-crashreporter
 ac_add_options --disable-updater
@@ -278,12 +280,10 @@ export CXXFLAGS="$(echo | gcc -Wp,-v -x c++ - -fsyntax-only 2>&1| grep "^ %{_lib
 
 %ifarch aarch64 %{ix86}
 export LDFLAGS="-Wl,--no-keep-memory -Wl,--reduce-memory-overheads"
-%endif
-
-%ifarch %{ix86}
 export RUSTFLAGS="-Cdebuginfo=0"
 %endif
 
+export MACH_USE_SYSTEM_PYTHON=1
 ./mach configure
 ./mach build
 
@@ -294,6 +294,7 @@ export RUSTFLAGS="-Cdebuginfo=0"
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 export DESTDIR=%{buildroot}
+export MACH_USE_SYSTEM_PYTHON=1
 ./mach install
 
 mkdir -p %{buildroot}%{_datadir}/applications
@@ -430,10 +431,10 @@ fi
 %{_libdir}/thunderbird/distribution/distribution.ini
 %dir %{tbdir}/distribution/extensions
 %{tbdir}/hyphenation
-%{tbdir}/features/wetransfer@extensions.thunderbird.net.xpi
+#%{tbdir}/features/wetransfer@extensions.thunderbird.net.xpi
 %dir %{tbdir}/fonts
 %{tbdir}/fonts/TwemojiMozilla.ttf
-%{tbdir}/gtk2/libmozgtk.so
+#%{tbdir}/gtk2/libmozgtk.so
 %dir %{tbdir}/isp
 %{tbdir}/isp/*
 %{tbdir}/lib*.so
@@ -443,6 +444,9 @@ fi
 %{tbdir}/removed-files
 
 %changelog
+* Sun Nov 28 2021 Automatic Build System <autodist@mambasoft.it> 91.3.2-1mamba
+- automatic version update by autodist
+
 * Sun Jul 18 2021 Automatic Build System <autodist@mambasoft.it> 78.12.0-1mamba
 - automatic version update by autodist