Examine source code of 1Page

{
  "name": "1Page",
  "version": "0.9.0.3",
  "description": "Preparing for meetings and calls is hard. Get 1 page customized summary, few minutes before every meeting, to sell more confidently!",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "storage",
    "cookies",
    "contextMenus"
  ],
  "icons": {
    "16": "assets/Logo16.png",
    "48": "assets/Logo48.png",
    "128": "assets/Logo128.png"
  }
}