Examine source code of Random Theme

{
  "manifest_version": 3,
  "name": "Random Theme",
  "version": "1.3.0",
  "description": "Picks a random installed Firefox theme on startup or on a repeating interval. Also includes a randomize button.",
  "permissions": [
    "management",
    "storage",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Random Theme",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "random-theme@robertwbattle.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}