Examine source code of Very Deep Forest

{
  "name": "Forest",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Forest2.png"
    },
    "colors": {
      "frame": "rgba(153, 196, 176, 1)",
      "tab_background_text": "rgba(39, 92, 30, 1)",
      "toolbar": "rgba(187, 189, 182, 0.53)",
      "bookmark_text": "rgba(114, 133, 19, 1)",
      "toolbar_field_text": "rgba(39, 92, 30, 1)"
    }
  }
}