Examine source code of Tiger_Mann

{
  "theme": {
    "images": {
      "theme_frame": "Tiger_Mann.jpg"
    },
    "colors": {
      "frame": "#1c1a03",
      "tab_background_text": "#f2efef"
    }
  },
  "version": "2.0",
  "name": "Tiger_Mann",
  "manifest_version": 2
}