diff --git a/package.json b/package.json
index 6d9baf4..830c0ae 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "author": "Tamius Han <tamius.han@gmail.com>",
   "scripts": {
     "build": "npm run pre-build; cross-env NODE_ENV=production BROWSER=firefox CHANNEL=stable webpack --hide-modules",
-    "build-all": "mkdir -p ./build/old; npm run pre-build; rm ./dist-zip/uw-amo-source.zip; mv -f ./dist-zip/*.zip ./build/old; npm run build; node scripts/build-zip.js ff; npm run build-chrome; node scripts/build-zip.js chrome; npm run build-edge; node scripts/build-zip.js edge; ./scripts/prepare-amo-source.sh",
+    "build-all": "bash ./scripts/build-all.sh",
     "build-chrome": "cross-env NODE_ENV=production BROWSER=chrome CHANNEL=stable webpack --hide-modules",
     "build-chrome:dev": "cross-env NODE_ENV=development BROWSER=chrome webpack --hide-modules",
     "build-edge": "cross-env NODE_ENV=production BROWSER=edge CHANNEL=stable webpack --hide-modules",
diff --git a/scripts/build-all.sh b/scripts/build-all.sh
new file mode 100644
index 0000000..fbd981f
--- /dev/null
+++ b/scripts/build-all.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# NOTE: this script needs to be run with the npm run build-all
+# command from the root directory of the project. Running it in
+# any other way probably isn't going to work.
+
+# pre-build steps: 
+mkdir -p ./build/old
+npm run pre-build
+rm ./dist-zip/uw-amo-source.zip
+mv -f ./dist-zip/*.zip ./build/old
+
+# build the version for each browser and create a zip afterwards
+# step 1: define build functions 
+#function buildFF {
+  npm run build
+  node scripts/build-zip.js ff
+#}
+#function buildChrome {
+  npm run build-chrome
+  node scripts/build-zip.js chrome
+#}
+#function buildEdge {
+  npm run build-edge
+  node scripts/build-zip.js edge
+#}
+
+# step 2: execute them all at once
+# buildFF &
+# buildChrome &
+# buildEdge &
+
+# wait < <(jobs -p)
+
+# prepare AMO source
+# source code needs to be prepared AFTER
+# the code has been built, to ensure that
+# package-lock.json remains unchanged
+./scripts/prepare-amo-source.sh