Examine source code of Simple QR Code

{
  "manifest_version": 2,
  "name": "Simple QR Code",
  "version": "1.2",
  "description": "Generate a QR code for the current tab",
  "homepage_url": "https://www.turtleduckstudios.com",
  "icons": {
    "16": "icons/qr-simple-qr-code_16.png",
    "48": "icons/qr-simple-qr-code_48.png",
    "96": "icons/qr-simple-qr-code_96.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/qr-simple-qr-code_16.png",
      "48": "icons/qr-simple-qr-code_48.png",
      "96": "icons/qr-simple-qr-code_96.png"
    },
    "theme_icons": [
      {
        "dark": "icons/qr-simple-qr-code_16.png",
        "light": "icons/qr-simple-qr-code_light_16.png",
        "size": 16
      },
      {
        "dark": "icons/qr-simple-qr-code_48.png",
        "light": "icons/qr-simple-qr-code_light_48.png",
        "size": 48
      },
      {
        "dark": "icons/qr-simple-qr-code_96.png",
        "light": "icons/qr-simple-qr-code_light_96.png",
        "size": 96
      }
    ],
    "default_title": "Simple QR Code",
    "default_popup": "src/simpleQR.html"
  }
}