Examine source code of ComicSansMe

{
  "manifest_version": 2,
  "name": "ComicSansMe",
  "version": "1.0",
  "description": "Make internet look better!",
  "icons": {
    "32": "icons/32.png",
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "comicsansize.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{164fd254-d661-483b-bfd8-84e972c92487}"
    }
  }
}