Examine source code of Rusted Texas Metal

{
  "theme": {
    "images": {
      "theme_frame": "TexasHeader.JPG"
    },
    "colors": {
      "frame": "#660000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Rusted Texas Metal",
  "manifest_version": 2,
  "description": "Has the word Texas\nand stars sometimes known as Texas Stars"
}