Examine source code of simple brown/tan

{
  "name": "simple brown/tan",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screen Shot 2022-07-20 at 19.14.41.png"
    },
    "colors": {
      "frame": "rgba(209, 203, 188, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(217, 208, 186, 1)",
      "bookmark_text": "rgba(153, 141, 116, 1)",
      "toolbar_field": "rgba(224, 214, 201, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{28c10ec3-a492-425b-8c85-56bfaca0327c}"
    }
  }
}