Examine source code of Macca Password Gen

{
  "manifest_version": 2,
  "name": "Macca Password Gen",
  "version": "1.1",
  "description": "Generate a secure password",
  "homepage_url": "https://github.com/michaelpmcmillan/firefox-password-generator",
  "icons": {
    "48": "icons/key-solid-48.png"
  },
  "browser_action": {
    "default_icon": "icons/key-solid-48.png",
    "default_title": "Macca Password Gen",
    "default_popup": "popup/password_gen_view.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{216dcfdd-b40b-435f-8b28-101d96752c5c}",
      "strict_min_version": "57.0"
    }
  },
  "permissions": [
    "storage"
  ]
}