Examine source code of Genealogy Helper

{
  "manifest_version": 2,
  "name": "Genealogy Helper",
  "version": "1.0",
  "description": "A tool to assist genealogists with citation formatting and note-taking.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{44437cfb-6583-4c08-b430-8e3266b55db1}"
    }
  }
}