Examine source code of Simple Sticky Notes

{
  "manifest_version": 3,
  "name": "Simple Sticky Notes",
  "version": "1.0.0",
  "description": "A simple sticky notes extension to take notes on any webpage.",
  "icons": {
    "128": "icons/icon.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "pages/popup.html",
    "default_icon": {
      "128": "icons/icon.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/note.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@extension-name.developer-name"
    }
  }
}