Examine source code of 23win

{
  "name": "capturing the essence of the cosmos",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1f2f73fef8d3ec23fba58fba4f96212b.jpg"
    },
    "colors": {
      "frame": "rgba(230, 221, 161, 1)",
      "tab_background_text": "rgba(240, 232, 163, 1)",
      "bookmark_text": "rgba(107, 99, 15, 1)",
      "toolbar_field": "rgba(107, 99, 15, 1)",
      "toolbar_field_text": "rgba(240, 232, 163, 1)",
      "tab_line": "rgba(107, 99, 15, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5fa6a397-762b-432a-aa72-1a40ee5e2f8b}"
    }
  }
}