Examine source code of Actual history

{
  "manifest_version": 3,
  "name": "Actual history",
  "version": "1.4",
  "browser_specific_settings": {
    "gecko": {
      "id": "{9508026d-4ad2-4376-ac8a-1dfc6e4e79f8}"
    }
  },
  "incognito": "not_allowed",
  "description": "Displays actual browsing history.",
  "action": {
    "default_title": "Actual history",
    "theme_icons": [
      {
        "dark": "/icon.svg",
        "light": "/icon-light.svg",
        "size": 128
      }
    ]
  },
  "commands": {
    "openHistory": {
      "description": "Open history in new tab",
      "suggested_key": {
        "default": "Ctrl+Alt+H"
      }
    }
  },
  "permissions": [
    "history"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "service_worker": "src/background.js"
  }
}