Examine source code of Simple Pastebin

{
  "name": "Simple Pastebin",
  "short_name": "simple-pastebin",
  "version": "1.1.0",
  "description": "Paste stuff, and it automatically saves as you paste/type!",
  "manifest_version": 2,
  "permissions": [
    "storage"
  ],
  "icons": {
    "48": "assets/icons/48.png",
    "128": "assets/icons/128.png",
    "512": "assets/icons/512.png"
  },
  "browser_action": {
    "default_title": "Simple Pastebin",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "assets/icons/48.png"
    }
  }
}