Examine source code of Sourcecatcher Fetcher

{
  "manifest_version": 2,
  "name": "Sourcecatcher Fetcher",
  "author": "piggies",
  "version": "1.1",
  "description": "Gets Sourcecatcher's results for an image.",
  "icons": {
    "48": "icons/scfetcher-48.png"
  },
  "permissions": [
    "contextMenus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "scfetcher.js"
    ]
  }
}