Examine source code of Daylight Theme Toggle

{
  "manifest_version": 2,
  "name": "Daylight Theme Toggle",
  "version": "1.0",
  "description": "Switch between light and dark themes quickly and remember your preference.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon-48.png",
      "96": "icon-96.png"
    }
  },
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{79e9e15e-d9b2-43f5-b0e1-5aa6aac9eaa3}"
    }
  }
}