Examine source code of Open in Rowboat

{
  "name": "Open in Rowboat",
  "version": "1.4.0",
  "description": "Open HTML tables, links to spreadsheets, and Google Sheets directly in Rowboat",
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "service_worker.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@open-in-rowboat"
    }
  },
  "action": {
    "default_icon": {
      "16": "images/icon_16.png",
      "32": "images/icon_32.png",
      "128": "images/icon_128.png",
      "256": "images/icon_256.png",
      "512": "images/icon_512.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://rowboat.net/*",
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "images/icon_16.png",
    "32": "images/icon_32.png",
    "128": "images/icon_128.png",
    "256": "images/icon_256.png",
    "512": "images/icon_512.png"
  },
  "manifest_version": 3
}