Examine source code of ROBLOX Prototype

{
  "theme": {
    "images": {
      "theme_frame": "ROBLOXPrototype.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "ROBLOX Prototype",
  "manifest_version": 2,
  "description": "Not finished yet, but published for previewers purposes and suggestions. \n\nIts built around the design of the website itself so it really feels like a ROBLOX persona. Your bookmarks will be the main interface like ROBLOX is. Most Visited is your My ROBLOX on Firefox of course, so the relation between them fits perfectly. ;)"
}