Examine source code of iHeartDogs

{
  "manifest_version": 2,
  "name": "iHeartDogs",
  "version": "0.1.1000.402resigned1",
  "permissions": [
    "activeTab",
    "storage",
    "cookies",
    "topSites",
    "alarms",
    "https://*.joona.io/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "description": "iHeartDogs by Joona",
  "chrome_url_overrides": {
    "newtab": "html/load.html"
  },
  "content_scripts": [
    {
      "js": [
        "js/cs/data-frame.js"
      ],
      "matches": [
        "https://*.joona.io/*"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "background": {
    "page": "html/background.html",
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eb8e9f1e-c02b-4a33-a263-5c4e05a8e08a}"
    }
  }
}