Examine source code of Facebook Privacy Guard

{
  "manifest_version": 3,
  "name": "Facebook Privacy Guard",
  "version": "1.0.1",
  "description": "Blur Facebook profile pictures, usernames, images and videos for privacy.",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://www.facebook.com/*"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Facebook Privacy Guard"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.facebook.com/*"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "facebook-privacy-guard@local.extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}