Examine source code of zeurel & black ace

{
  "theme": {
    "images": {
      "theme_frame": "zeurel.JPG"
    },
    "colors": {
      "frame": "#a19e9e",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "zeurel & black ace",
  "manifest_version": 2,
  "description": "me, black ace and apparition welcoming you to nevera"
}