diff --git a/Makefile b/Makefile
index 2a243de..ebf187a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY : help all clean veryclean fetch build artifacts update
+.PHONY : help all clean veryclean fetch build artifacts update full-mar
 
 help :
 	@echo "Use: make [all] [clean] [veryclean] [check] ..."
@@ -7,6 +7,7 @@ help :
 	@echo "  clean     - Remove output files and temporary files."
 	@echo "  veryclean - Like 'clean', but also remove all downloaded files."
 	@echo "  update    - update 'version' and 'source_release' files."
+	@echo "  full-mar  - create mar setup file."
 	@echo ""
 	@echo "  fetch     - Fetch the latest librewolf source."
 	@echo "  build     - Perform './mach build && ./mach package' on it."
@@ -47,3 +48,6 @@ debug :
 
 artifacts :
 	python3 mk.py artifacts
+
+full-mar :
+	python3 mk.py full-mar
diff --git a/assets/mozconfig.windows b/assets/mozconfig.windows
index 7b00a00..9450987 100644
--- a/assets/mozconfig.windows
+++ b/assets/mozconfig.windows
@@ -5,7 +5,6 @@ ac_add_options --disable-crashreporter
 ac_add_options --disable-debug
 ac_add_options --disable-default-browser-agent
 ac_add_options --disable-tests
-ac_add_options --disable-updater
 ac_add_options --enable-hardening
 ac_add_options --enable-optimize
 ac_add_options --enable-release
@@ -31,14 +30,9 @@ mk_add_options MOZ_TELEMETRY_REPORTING=0
 # - no need to specify wasi sdk folder
 #
 
-ac_add_options --disable-updater
-ac_add_options --disable-maintenance-service
 ac_add_options --enable-strip
 
 # needed for windows/mac auto update ONLY. it's a security risk so other OSses don't need it
 # https://firefox-source-docs.mozilla.org/taskcluster/setting-up-an-update-server.html
 
 ac_add_options --disable-verify-mar
-
-
-
diff --git a/mk.py b/mk.py
index 1a4e1cc..cc1a0cd 100644
--- a/mk.py
+++ b/mk.py
@@ -13,6 +13,28 @@ from assets.tools import exec, patch
 def deps_win32():
     exec('rustup target add i686-pc-windows-msvc')
 
+def full_mar():
+    with open('version','r') as file:
+        version = file.read().rstrip()
+        with open('source_release','r') as file:
+            source_release = file.read().rstrip()
+            os.chdir('librewolf-{}-{}'.format(version,source_release))
+
+            # see https://firefox-source-docs.mozilla.org/taskcluster/setting-up-an-update-server.html
+
+            objdir = 'obj-x86_64-pc-mingw32'
+            mar_output_path = 'MAR'
+            # version already set
+            channel = 'default'
+
+            exec('mkdir -p MAR') # output folder
+            
+            exec('touch {}/dist/firefox/precomplete'.format(objdir))
+            exec('MAR={}/dist/host/bin/mar.exe MOZ_PRODUCT_VERSION={}-{} MAR_CHANNEL_ID={} ./tools/update-packaging/make_full_update.sh {} {}/dist/firefox'.format(objdir,version,source_release,channel,mar_output_path,objdir))
+
+            # restore state
+            os.chdir('..')
+    pass
 
 def fetch():
     exec('wget -q -O version https://gitlab.com/librewolf-community/browser/source/-/raw/main/version')
@@ -215,6 +237,9 @@ for arg in sys.argv:
     elif arg == 'artifacts':
         artifacts()
         done_something = True
+    elif arg == 'full-mar':
+        full_mar()
+        done_something = True
     elif arg == 'upload':
         in_upload = True
     else:
diff --git a/release b/release
index 573541a..d00491f 100644
--- a/release
+++ b/release
@@ -1 +1 @@
-0
+1