Examine source code of Birthday Cakes

{
  "name": "Birthday Cakes",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "FF_BD_Cakes.jpg"
    },
    "colors": {
      "frame": "rgba(242, 182, 201, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f487d3f-67fb-4f72-bff1-e429dfb16b70}"
    }
  }
}