Examine source code of Instagram Viewer & Blocker

{
  "manifest_version": 3,
  "name": "Instagram Viewer & Blocker",
  "version": "1.0.1",
  "description": "View profiles and block any Instagram account — even ones that blocked you first.",
  "permissions": [
    "cookies",
    "activeTab",
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "https://www.instagram.com/*",
    "https://*.cdninstagram.com/*",
    "https://*.fbcdn.net/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ig-blocker@husanboy",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.instagram.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Instagram Viewer & Blocker",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  }
}