Examine source code of Custom Dark Mode Toggle

{
  "manifest_version": 3,
  "name": "Custom Dark Mode Toggle",
  "version": "1.0",
  "description": "Applies a customizable dark mode to any website, allowing users to adjust colors, contrast, and brightness settings on a per-site basis, beyond simple inversion.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "custom_dark_mode_toggle.png"
  },
  "icons": {
    "128": "custom_dark_mode_toggle.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "barton4coronelxiq741@hotmail.com"
    }
  }
}