Examine source code of Radiation everywhere

{
  "theme": {
    "images": {
      "theme_frame": "radiation.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#7dffa8"
    }
  },
  "version": "2.0",
  "name": "Radiation everywhere",
  "manifest_version": 2,
  "description": "bored"
}