Examine source code of lost

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#0e053d",
      "tab_background_text": "#f4f2f7"
    }
  },
  "version": "2.0",
  "name": "lost",
  "manifest_version": 2
}