Examine source code of Wikipedia Content Resizer

{
  "manifest_version": 2,
  "name": "wikiResizer",
  "version": "1.0",
  "description": "resizing for wikipedia content",
  "icons": {
    "48": "icons/wiki.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wikipedia.org/*"
      ],
      "js": [
        "wikiResizer.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{756ea3ba-8575-4e32-bad6-bce794f9d80d}"
    }
  }
}