Examine source code of Digital Sunset

{
  "name": "Digital Sunset",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "digital1H.jpg"
    },
    "colors": {
      "frame": "rgba(102, 3, 0, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(102, 5, 0, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(102, 5, 0, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{de871e6d-df51-4f9b-be66-c570b03f7452}"
    }
  }
}