Examine source code of Retro Rocket

{
  "theme": {
    "images": {
      "theme_frame": "BrowserHeaderRetroRocket.jpg"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Retro Rocket",
  "manifest_version": 2,
  "description": "What I did was make a red and darker gradient. I then made three silver lines and I made two circles  around the rocket. I then embossed the rocket and I also added the words Retro Rocket. I wanted to make because it reminds me of the old tv shows from the 50s and 60s and the space race."
}