Examine source code of pinmenote

{
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "contact@pinmenote.com"
    }
  },
  "name": "pinmenote",
  "short_name": "pinmenote",
  "description": "Pin note, modify, draw, comment and archive websites.",
  "homepage_url": "https://pinmenote.com",
  "version": "0.1.6",
  "icons": {
    "16": "16.f4dab451.png",
    "48": "48.c63a61a7.png",
    "128": "128.dae439b4.png"
  },
  "author": "pinmenote (contact@pintmenote.com)",
  "browser_action": {
    "default_icon": {
      "16": "16.f4dab451.png",
      "24": "24.6ebff3e1.png",
      "32": "32.e94714b4.png"
    },
    "default_title": "pinmenote",
    "default_popup": "default-popup.4a03ccde.html"
  },
  "permissions": [
    "activeTab",
    "storage",
    "unlimitedStorage",
    "scripting",
    "downloads",
    "http://*/*",
    "https://*/*",
    "<all_urls>"
  ],
  "background": {
    "persistent": true,
    "scripts": [
      "service-worker.1075bcd8.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.64b7d5fa.js"
      ],
      "run_at": "document_start",
      "css": []
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "iframe-script.71eee5ee.js"
      ],
      "run_at": "document_idle",
      "css": []
    }
  ],
  "options_ui": {
    "page": "options-ui.1ad795bd.html"
  }
}