Examine source code of Sunset Sakura

{
  "name": "Sunset  Sakura",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "ff-theme-sunsetsakura.png"
    },
    "colors": {
      "frame": "rgba(147, 150, 219, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(242, 215, 241, 0.6)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.47)",
      "tab_line": "rgba(0, 0, 0, 0.07)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4f197075-d5fd-49a5-b92d-2051a9401a35}"
    }
  }
}