Examine source code of Dead flowers

{
  "name": "Dead flowers",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "deadflowers2023-1.png"
    },
    "colors": {
      "frame": "rgba(99, 99, 99, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(190, 120, 98, 0.52)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(187, 49, 105, 0.54)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 149, 0, 0.71)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2a009651-698d-41d8-9247-6d64cdd8ea82}"
    }
  }
}