Examine source code of black hole space

{
  "name": "blackholespace",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "blackholespace.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0)",
      "tab_background_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{42d79198-e99e-47c1-aa62-6c44787c717b}"
    }
  }
}