Examine source code of maestros

{
  "theme": {
    "images": {
      "theme_frame": "quebuenperfildios.JPG"
    },
    "colors": {
      "frame": "#0d0c0c",
      "tab_background_text": "#0a0808"
    }
  },
  "version": "2.0",
  "name": "maestros",
  "manifest_version": 2,
  "description": "son unos grandes jajaja me encantaria abrir firefox y verlos !"
}