1. Unzip BuyBoxMap-Chrome-Extension.zip (you get a folder called BuyBoxMap-Extension).
2. In Chrome open chrome://extensions and turn on "Developer mode" (top right).
3. Click "Load unpacked" and pick the unzipped BuyBoxMap-Extension folder.
4. Pin it: click the puzzle icon in Chrome's toolbar, then the pin next to Buy Box Map.
5. Open any Amazon product page, click the icon, enter your Buy Box Map code once (e.g. your team code).
6. Updating from an older version: unzip the new file over the old folder (or remove the old one), then click the ↻ reload arrow on Buy Box Map in chrome://extensions.
