Examine source code of DGF background with white

{
  "name": "Basic",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "wp6321010.jpg"
    },
    "colors": {
      "frame": "rgba(7, 69, 71, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(174, 212, 201, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(220, 250, 240, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eed3b9af-7de4-4c3e-87fd-2d2c9bf8dbb4}"
    }
  }
}