Examine source code of YouTube Ad Placer

{
  "manifest_version": 2,
  "name": "YouTube Ad Placer",
  "version": "1.1.1.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-ad-placer@extension.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "icon32.svg",
    "48": "icon32.svg",
    "96": "icon32.svg",
    "128": "icon128.svg"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "32": "icon32.svg"
    }
  },
  "content_security_policy": "script-src 'self' https://unpkg.com; object-src 'self'",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "http://studio.youtube.com/*",
    "https://studio.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://studio.youtube.com/*",
        "https://studio.youtube.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "injected.js"
  ]
}