Examine source code of Transparency

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "2.2",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "homepage_url": "https://fuldgennemsigtighed.dk",
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@fuldgennemsigtighed.dk",
      "strict_min_version": "55.0"
    }
  },
  "icons": {
    "16": "icons/icons8-grades-16.png",
    "24": "icons/icons8-grades-24.png",
    "48": "icons/icons8-grades-48.png",
    "96": "icons/icons8-grades-96.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "type": "module"
  },
  "browser_action": {
    "default_title": "Transparency",
    "default_popup": "options/options.html",
    "theme_icons": [
      {
        "light": "icons/icons8-grades-16.png",
        "dark": "icons/icons8-grades-16.png",
        "size": 16
      },
      {
        "light": "icons/icons8-grades-32.png",
        "dark": "icons/icons8-grades-32.png",
        "size": 32
      }
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ]
    }
  ]
}