Examine source code of Bottlebrush

{
  "theme": {
    "images": {
      "theme_frame": "bottlebrushheader1081.jpg"
    },
    "colors": {
      "frame": "#363333",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Bottlebrush",
  "manifest_version": 2,
  "description": "Red Australian bottlebrush flowers against a backdrop of green leaves. From an original photograph."
}