Examine source code of mlnlmal

{
  "manifest_version": 2,
  "name": "mlnlmal",
  "version": "1.2",
  "description": "A simple url shortner",
  "homepage_url": "http://mlnlmal.ml",
  "permissions": [
    "tabs",
    "notifications",
    "clipboardWrite"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Make it short!"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}