Examine source code of Global Input App

{
  "name": "Global Input App",
  "icons": {
    "16": "images/globalInput16.png",
    "24": "images/globalInput24.png",
    "32": "images/globalInput32.png",
    "48": "images/globalInput48.png",
    "128": "images/globalInput128.png"
  },
  "version": "3.1.3",
  "manifest_version": 2,
  "description": "Use your mobile to operate on web pages in your computer browser to login, subscribe, encrypt, or control any element in the page.",
  "homepage_url": "https://globalinput.co.uk/",
  "browser_action": {
    "default_icon": {
      "16": "images/globalInput16.png",
      "24": "images/globalInput24.png",
      "32": "images/globalInput32.png",
      "48": "images/globalInput48.png",
      "128": "images/globalInput128.png"
    },
    "default_popup": "index.html"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}