Examine source code of Planet X Spotted

{
  "theme": {
    "images": {
      "theme_frame": "px_persona_header.jpg"
    },
    "colors": {
      "frame": "#2c5c05",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Planet X Spotted",
  "manifest_version": 2,
  "description": "Planet X has been spotted on SoHo before the image is edited."
}