Examine source code of NotesQR Extension

{
  "manifest_version": 2,
  "name": "NotesQR Extension",
  "version": "1.3.5",
  "description": "Share files easily and securely using NotesQR backend.",
  "browser_action": {
    "default_title": "NotesQR Extension"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "https://notesqr.com/*",
    "storage"
  ],
  "web_accessible_resources": [
    "messages/*.json",
    "popup.html",
    "popup.js",
    "i18n.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "notesqr@extension.com",
      "strict_min_version": "142.0"
    }
  }
}