Examine source code of Steampunk by M♥Donna

{
  "name": "Steampunk by M♥Donna",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Steampunk.jpg"
    },
    "colors": {
      "frame": "rgba(68, 51, 36, 1)",
      "tab_background_text": "rgba(255, 243, 200, 1)",
      "toolbar": "rgba(71, 52, 35, 0)",
      "bookmark_text": "rgba(255, 242, 196, 1)",
      "toolbar_field": "rgba(68, 51, 36, 0.06)",
      "toolbar_field_text": "rgba(252, 238, 189, 1)",
      "tab_line": "rgba(255, 242, 194, 1)"
    }
  }
}