Examine source code of fancy art no.2

{
  "name": "fancy art no.2",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "2001-4.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(184, 184, 184, 0.88)",
      "toolbar": "rgba(1, 97, 81, 0.2)",
      "bookmark_text": "rgba(230, 230, 230, 1)",
      "toolbar_field": "rgba(3, 3, 3, 0.43)",
      "toolbar_field_text": "rgba(230, 230, 230, 1)",
      "tab_line": "rgba(122, 52, 27, 0.88)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6b51b386-df38-4102-a872-3ee61bb2eb62}"
    }
  }
}