Examine source code of Forest Dense

{
  "name": "Forest",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "forest-walkway-3840x2160-13157.jpg"
    },
    "colors": {
      "frame": "rgba(17, 51, 8, 1)",
      "tab_background_text": "rgba(204, 255, 212, 1)",
      "toolbar": "rgba(17, 71, 9, 1)",
      "bookmark_text": "rgba(204, 255, 212, 1)",
      "toolbar_field": "rgba(7, 20, 9, 0.35)",
      "toolbar_field_text": "rgba(204, 255, 212, 1)",
      "tab_line": "rgba(204, 255, 212, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aefda4ac-43af-4a7f-9520-136de52cd23a}"
    }
  }
}