Examine source code of History Heatmap

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "192.2.5",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d4c7f58-5bb6-4c58-9358-7e73ac677b11}",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  },
  "permissions": [
    "history"
  ],
  "icons": {
    "48": "img/icon.svg",
    "96": "img/icon.svg"
  },
  "browser_action": {
    "default_icon": "img/icon.svg",
    "default_title": "__MSG_browserActionTitle__",
    "default_popup": "src/popup.html"
  }
}