Examine source code of vfbcvb

{
  "name": "vfbcvb",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "vfbcvb.jpg"
    },
    "colors": {
      "frame": "rgba(72, 102, 88, 1)",
      "tab_background_text": "rgba(123, 150, 136, 1)",
      "toolbar": "rgba(64, 82, 73, 1)",
      "bookmark_text": "rgba(178, 212, 195, 1)",
      "toolbar_field": "rgba(75, 92, 83, 1)",
      "toolbar_field_text": "rgba(178, 212, 195, 1)"
    }
  }
}