Examine source code of AMM New Tab

{
  "name": "AMM New Tab",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "wallpaperflare.com_wallpaper (70).jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(196, 43, 191, 0.84)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(242, 34, 110, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f6b9abaf-9cc0-4b04-9908-b6b52dba8585}"
    }
  }
}