Examine source code of Leaves by M♥Donna

{
  "name": "Leaves by M♥Donna",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(110, 53, 42, 1)",
      "tab_background_text": "rgba(221, 245, 8, 1)",
      "toolbar": "rgba(112, 55, 43, 0)",
      "bookmark_text": "rgba(221, 245, 8, 1)",
      "toolbar_field": "rgba(112, 55, 43, 0.06)",
      "toolbar_field_text": "rgba(221, 245, 8, 1)",
      "tab_line": "rgba(221, 245, 8, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7c0be5b8-67d8-4cb8-8373-d5fa8070ee55}"
    }
  }
}