Examine source code of ClassAtlas

{
  "manifest_version": 3,
  "name": "ClassAtlas",
  "version": "1.0.0",
  "description": "Map class-name usage density and identify heavy utility chains across the active page.",
  "icons": {
    "48": "mark/icon-48.png",
    "96": "mark/icon-96.png",
    "128": "mark/icon-128.png"
  },
  "action": {
    "default_title": "ClassAtlas",
    "default_icon": {
      "48": "mark/icon-48.png"
    }
  },
  "background": {
    "scripts": [
      "relay/bridge.js"
    ],
    "service_worker": "relay/bridge.js"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{72a74e79-ce52-43f8-95f9-18bc6f926541}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}