Examine source code of Emperor Note New Tab

{
  "name": "Joker DC Comics HD Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "wallpaperflare.com_wallpaper (20).jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(82, 141, 212, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(27, 30, 219, 1)",
      "toolbar_field_text": "rgba(255, 247, 247, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a28e24c3-154d-4039-9fac-1fc34829173d}"
    }
  }
}