Examine source code of Bread_1

{
  "name": "Bread_1",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot 2023-05-21 at 18-20-35 Google Themes.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4c99eac-3c31-4587-8e7b-1e40a8dda1d6}"
    }
  }
}