Examine source code of IG Unfollowers

{
  "manifest_version": 3,
  "name": "IG Unfollowers",
  "version": "1.2.0",
  "description": "Securely identify Instagram accounts you follow who don't follow you back. 100% private, client-side, zero login required.",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "https://www.instagram.com/*"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "IG Unfollowers",
    "default_icon": {
      "16": "icon16-dark.png",
      "48": "icon48-dark.png",
      "128": "icon128-dark.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ig-unfollowers@adrigo.dev",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}