Examine source code of Hey Ladies

{
  "manifest_version": 2,
  "name": "Hey Ladies",
  "version": "0.1.3resigned1",
  "description": "Replaces all instances of guy and guys with the more gender neutral 'ladies' or 'lady'.",
  "icons": {},
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "hey-ladies.js",
        "index.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "Hey Ladies",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{35dace7b-4019-4902-9ee6-c05cc1018de8}"
    }
  }
}