Examine source code of Tab Monster

{
  "icons": {
    "16": "icon16.plasmo.2577fc03.png",
    "32": "icon32.plasmo.d583dc1e.png",
    "48": "icon48.plasmo.e0fcfb1d.png",
    "64": "icon64.plasmo.e6259081.png",
    "128": "icon128.plasmo.96a1ede9.png"
  },
  "manifest_version": 3,
  "action": {
    "default_icon": {
      "16": "icon16.plasmo.2577fc03.png",
      "32": "icon32.plasmo.d583dc1e.png",
      "48": "icon48.plasmo.e0fcfb1d.png",
      "64": "icon64.plasmo.e6259081.png",
      "128": "icon128.plasmo.96a1ede9.png"
    },
    "default_popup": "popup.html"
  },
  "version": "1.2.0",
  "author": "Daniil Pokrovsky",
  "name": "Tab Monster",
  "description": "Lighting fast Tab Organizer for busy people 🚀. Organize tabs in seconds!",
  "permissions": [
    "downloads",
    "tabs",
    "tabGroups",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a3d6bc33-f0ac-4114-b79a-7c068e1a7605}",
      "strict_min_version": "42.0"
    }
  }
}