Examine source code of Dark Scarlett

{
  "name": "Dark Scarlett",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Bg.png"
    },
    "colors": {
      "frame": "rgba(56, 56, 56, 1)",
      "tab_background_text": "rgba(255, 130, 130, 1)",
      "toolbar": "rgba(122, 122, 122, 1)",
      "bookmark_text": "rgba(207, 37, 37, 1)",
      "toolbar_field": "rgba(204, 204, 204, 1)",
      "toolbar_field_text": "rgba(255, 0, 0, 1)",
      "tab_line": "rgba(255, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bda54f2a-3cd3-4268-80c5-5aa81995b332}"
    }
  }
}