Examine source code of Always Amazon Smiling

{
  "name": "Always Amazon Smiling",
  "version": "1.0.0",
  "description": "A simple tool to redirect you from Amazon's sites to their Amazon Smile counterparts.",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.min.js"
    ]
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://www.amazon.com/*",
    "*://www.amazon.de/*",
    "*://www.amazon.co.uk/*",
    "*://amazon.com/*",
    "*://amazon.de/*",
    "*://amazon.co.uk/*"
  ],
  "icons": {
    "128": "icon.png"
  },
  "author": "Ronchetto, Matt (doamatto) <hello@doamatto.xyz> (https://doamatto.xyz)",
  "homepage_url": "https://github.com/doamatto/always-amazon-smiling"
}