Update README

README.md

@@ -30,3 +30,17 @@ It should work on macOS and Windows as well as on Linux.
 
 - Go to `chrome://extensions/shortcuts` to customize the keyboard shortcuts to your liking.
   On Windows and macOS, you may also set the shortcut to be global, so that you can use it outside Chrome.
+
+## Testing on a fresh Chrome profile
+
+```sh
+# Generates an extension package
+./scripts/build-package.sh
+
+# These two files are generated:
+# 1. `tmp/vx` - and unpacked extension
+# 2. `tmp/vx.zip` - the zipped version, for uploading to Google Chrome developer dashboard
+
+# Run it
+rm -rf tmp/chrome-profile && /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --no-first-run --no-default-browser-check --user-data-dir="$PWD/tmp/chrome-profile" --load-extension="$PWD/tmp/vx"
+```