Examine source code of Wathermellon

{
  "name": "Wathermelon",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "windows11.jpg"
    },
    "colors": {
      "frame": "rgba(163, 3, 3, 1)",
      "tab_background_text": "rgba(240, 9, 9, 1)",
      "toolbar": "rgba(87, 21, 21, 1)",
      "bookmark_text": "rgba(96, 158, 14, 1)",
      "toolbar_field": "rgba(27, 176, 25, 1)",
      "toolbar_field_text": "rgba(54, 87, 56, 1)",
      "tab_line": "rgba(207, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c3fb7f5b-21e9-40fe-9986-6daba94dc558}"
    }
  }
}