Examine source code of Rationalist Atheism

{
  "theme": {
    "images": {
      "theme_frame": "RationalistAtheism-Top.jpg"
    },
    "colors": {
      "frame": "#ff00de",
      "tab_background_text": "#004da4"
    }
  },
  "version": "2.0",
  "name": "Rationalist Atheism",
  "manifest_version": 2,
  "description": "So Atheists can snazz up their browser. They deserve it with all that rational thinking they are doing.\n\nThe background is a beautiful picture of the Orion Nebula taken by the Hubble Space Telescope, with my designs added to it."
}