Examine source code of b4shop

{
  "theme": {
    "images": {
      "theme_frame": "b4shopheaderfirf.jpg"
    },
    "colors": {
      "frame": "#b0aaaa",
      "tab_background_text": "#d4d2d2"
    }
  },
  "version": "2.0",
  "name": "b4shop",
  "manifest_version": 2
}