Examine source code of Speed Browser

{
  "theme": {
    "images": {
      "theme_frame": "logoup.jpg"
    },
    "colors": {
      "frame": "#461ff2",
      "tab_background_text": "#f7f2ef"
    }
  },
  "version": "2.0",
  "name": "Speed Browser",
  "manifest_version": 2,
  "description": "refer to title"
}