Examine source code of Notes Box

{
  "name": "Notes Box",
  "description": "Notes Box take and save short notes and reminders.",
  "version": "1.0",
  "browser_action": {
    "default_popup": "src/popup.html",
    "default_icon": "img/icons/icon48.png"
  },
  "icons": {
    "16": "img/icons/icon16.png",
    "32": "img/icons/icon32.png",
    "48": "img/icons/icon48.png",
    "128": "img/icons/icon128.png"
  },
  "manifest_version": 2,
  "permissions": []
}