diff --git a/firefox_esr.be0 b/firefox_esr.be0
index 5ac301ee2..9227c0aeb 100755
--- a/firefox_esr.be0
+++ b/firefox_esr.be0
@@ -1,40 +1,47 @@
 #!/bin/env beesh
 
-# BEE_VERSION firefox_esr-78.9.0-2
+# BEE_VERSION firefox_esr-91.11.0-0
 
 #export BEE_TMP_TMPDIR=/dev/shm BEE_TMP_BUILDROOT=/dev/shm/bee-root BEE_MAKEFLAGS='-j80'
 
 #SRCURL[0]="https://ftp.mozilla.org/pub/firefox/releases/${PKGVERSION}${PKGEXTRANAME}/source/firefox-${PKGVERSION}${PKGEXTRANAME}.source.tar.xz"
 
-SRCURL[0]="https://beehive.molgen.mpg.de/10529ea05d2a1b46eb239330a3ae5471/firefox-78.9.0esr.source.tar.xz"
+SRCURL[0]="https://beehive.molgen.mpg.de/34e1d9a3347bccb1010491d3789aa77e/firefox-91.11.0esr.source.tar.xz"
+
+mee_patch() {
+  sed -i '/ROOT_CLIP_CHAIN/d' ${S}/gfx/webrender_bindings/webrender_ffi.h
+}
 
 mee_configure() {
 
     . /usr/local/package/lib/node.profile
-    . /pkg/rustc-1.50.0-0/profile
-
+    . /pkg/rustc-1.63.0-0/profile
+    
     cat > ${S}/mozconfig <<-EOF
         ac_add_options --enable-application=browser
         ac_add_options --disable-necko-wifi
         ac_add_options --enable-official-branding
         ac_add_options --without-system-icu
         ac_add_options --without-system-nspr
-        ac_add_options --disable-elf-hack
         ac_add_options --disable-updater
         ac_add_options --disable-crashreporter
         ac_add_options --disable-tests
         ac_add_options --enable-optimize
+        ac_add_options --disable-debug-symbols
+        ac_add_options --enable-bootstrap
         mk_add_options MOZ_MAKE_FLAGS="${BEE_MAKEFLAGS}"
         mk_add_options MOZ_OBJDIR=$B
         unset MOZ_TELEMETRY_REPORTING
 	EOF
+  export MACH_USE_SYSTEM_PYTHON=1
+  MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE=none
+  export MOZBUILD_STATE_PATH=${B}/mozbuild
   ${S}/mach configure
 }
 
 mee_build() {
   export CARGO_HOME=$B/.cargo
   export CC=gcc CXX=g++
-  export MOZBUILD_STATE_PATH=${B}/mozbuild
   ${S}/mach build
 }
 
@@ -102,9 +109,9 @@ mee_install_post() {
 	EOF
 
 	chmod 755 ${D}/usr/local/bin/sbportal
-	
-	
-	
+
+
+
 cat <<-EOF >${D}${PREFIX}/local/lib/firefox/defaults/pref/autoconfig.js
   // Any comment. You must start the file with a comment!
 pref("general.config.filename", "default_config_mariux.cfg");