Examine source code of MSNBC-Style

{
  "theme": {
    "images": {
      "theme_frame": "MSNBC-Style-Gradient-head.jpg"
    },
    "colors": {
      "frame": "#333333",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "MSNBC-Style",
  "manifest_version": 2,
  "description": "A simple colorful gradient and texture, similar to MSNBC's background."
}