Examine source code of Spy Library

{
  "manifest_version": 2,
  "name": "Spy Library",
  "version": "1.0.0",
  "description": "Track public ads, detect store platforms, save & organize creatives.",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "browser_action": {
    "default_title": "Spy Library",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "https://app.spylibrary.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.facebook.com/ads/library/*",
        "https://web.facebook.com/ads/library/*",
        "https://m.facebook.com/ads/library/*"
      ],
      "js": [
        "script.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    },
    {
      "matches": [
        "https://app.spylibrary.com/*"
      ],
      "js": [
        "pair.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "web_accessible_resources": [
    "img/*",
    "countries.json"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "spylibrary@spylibrary.com",
      "strict_min_version": "109.0"
    }
  }
}