Examine source code of Foogle

{
  "manifest_version": 2,
  "name": "Foogle",
  "version": "1.2",
  "description": "Removes google tracking redirects from search results",
  "icons": {
    "48": "foogle48.png",
    "512": "foogle512.png"
  },
  "permissions": [
    "<all_urls>",
    "scripting"
  ],
  "background": {
    "scripts": [
      "registercs.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "foogle@bounce.hopto.org"
    }
  }
}