Examine source code of Send URL to NotePlan

{
  "manifest_version": 2,
  "name": "Send URL to NotePlan",
  "author": "David Wertheimer",
  "description": "Sends the URL of the current tab with a markdown link to NotePlan",
  "version": "0.4",
  "browser_specific_settings": {
    "gecko": {
      "id": "send-url-to-noteplan@dwertheimer",
      "strict_min_version": "91.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Send URL to NotePlan",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "extension-logo/icon-16.png",
    "32": "extension-logo/icon-32.png",
    "48": "extension-logo/icon-48.png",
    "128": "extension-logo/icon-128.png"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+G",
        "mac": "Alt+Shift+G"
      },
      "description": "Send current tab URL to NotePlan"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}