Examine source code of Change My Location

{
  "name": "Change My Location",
  "version": "1.1.1",
  "description": "Easily change your location to see search results in an other city, state, or country! Great for marketing research.",
  "manifest_version": 2,
  "author": "NDS Digital",
  "icons": {
    "128": "icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Change My Location",
    "default_icon": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "google-script.js"
      ]
    }
  ],
  "permissions": [
    "storage",
    "geolocation",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "web_accessible_resources": [
    "icon.png",
    "index.html",
    "google-script.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{be3c0a0e-8ed5-4988-b3b8-c53beabd66f3}"
    }
  }
}