Examine source code of OpenLP Resizer

{
  "manifest_version": 2,
  "name": "OpenLP Resizer",
  "version": "2.0",
  "author": "LordPrinz, Dzajlopment",
  "description": "Makes previous and next buttons bigger.",
  "content_scripts": [
    {
      "matches": [
        "http://localhost/",
        "*://*/"
      ],
      "js": [
        "openLP.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9d1a89f6-ce89-4487-9068-31569dfa3532}"
    }
  }
}