Examine source code of QuickBoard

{
  "description": "A simple extension that keeps a sidebar of saved clipboard snippets.",
  "version": "2.0",
  "manifest_version": 3,
  "name": "QuickBoard",
  "icons": {
    "600": "icons/clipboard-600.png"
  },
  "permissions": [
    "storage",
    "downloads",
    "clipboardWrite"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_title": "QuickBoard",
    "default_icon": "icons/clipboard-600.png",
    "default_panel": "sidebar/sidebar.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "derrick.han.sun@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_title": "Toggle QuickBoard sidebar",
    "default_icon": "icons/clipboard-600.png",
    "theme_icons": [
      {
        "light": "icons/clipboard-600.png",
        "dark": "icons/clipboard-600.png",
        "size": 600
      }
    ]
  }
}