Examine source code of Facebook Npc Marker

{
  "name": "Facebook Npc Marker",
  "version": "0.8",
  "manifest_version": 3,
  "description": "Highlights identified troll profiles' comments, reactions on Facebook. Also marks profiles on Followers page.",
  "icons": {
    "48": "icon.png"
  },
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@facebook-npc-marker",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://facebook.com/**",
        "https://www.facebook.com/**",
        "https://www.facebook.com/"
      ],
      "js": [
        "sources.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/datasources/telex/profiles.json",
        "assets/npc.png"
      ],
      "matches": [
        "https://facebook.com/*",
        "https://www.facebook.com/*"
      ]
    }
  ]
}