Examine source code of Basic Solid Gold

{
  "name": "Basic Solid Gold",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot 2022-07-01 165336.png"
    },
    "colors": {
      "frame": "rgba(220, 197, 122, 1)",
      "tab_background_text": "rgba(63, 62, 36, 1)",
      "toolbar": "rgba(63, 62, 36, 1)",
      "bookmark_text": "rgba(220, 197, 122, 1)",
      "toolbar_field": "rgba(184, 158, 30, 1)",
      "toolbar_field_text": "rgba(63, 62, 36, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4301e536-8598-4005-a247-35e0655cf4b1}"
    }
  }
}