Examine source code of aesthetic downtown

{
  "name": "aesthetic downtown",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "heasrt.jpg"
    },
    "colors": {
      "frame": "rgba(128, 0, 28, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(199, 101, 101, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(128, 0, 21, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dc575b78-527e-4417-9402-2669e67410ff}"
    }
  }
}