Examine source code of CaptureKit

{
  "manifest_version": 3,
  "name": "CaptureKit",
  "description": "Capture full pages, selected areas, and short local tab recordings.",
  "version": "1.0.0",
  "short_name": "CaptureKit",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "alarms"
  ],
  "host_permissions": [],
  "action": {
    "default_title": "CaptureKit",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "capturekit@example.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}