Examine source code of Vincent Red and grey

{
  "theme": {
    "images": {
      "theme_frame": "Barrefirefox.jpg"
    },
    "colors": {
      "frame": "#2e2e2e",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Vincent Red and grey",
  "manifest_version": 2,
  "description": "Mon persona rien qu'a moi :D"
}