Examine source code of mozadds

{
  "manifest_version": 2,
  "name": "mozadd",
  "version": "1.1resigned1",
  "description": "Adds a red border to all webpages matching mozilla.org.",
  "browser_action": {
    "default_title": "add-ons",
    "default_popup": "tabs.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mozilla.org/*"
      ],
      "js": [
        "mozadd.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d7ecc1cc-dce7-438d-873e-cd319887997e}"
    }
  }
}