Examine source code of Shiny Balls

{
  "name": "Shiny Balls",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(255, 240, 240, 1)",
      "tab_background_text": "#000000",
      "toolbar": "rgba(255, 255, 255, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(252, 252, 252, 0.06)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(3, 39, 168, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f49f6e1-671e-467d-a74e-d6de7cbc2a51}"
    }
  }
}