Examine source code of Out in Space

{
  "theme": {
    "images": {
      "theme_frame": "firefox-space-header.jpg"
    },
    "colors": {
      "frame": "#c4c4c4",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Out in Space",
  "manifest_version": 2,
  "description": "100% original work all done in photoshop, was used as the backdrop in a 5760x1200 Gundam wallpaper I made for triple monitor computer setups."
}