Examine source code of HEEF_neruba

{
  "theme": {
    "images": {
      "theme_frame": "HEEF_persona_header.png"
    },
    "colors": {
      "frame": "#158ca1",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "HEEF_neruba",
  "manifest_version": 2,
  "description": "Logo of fiction Nerubean University's Hight Energy Experimental Facility"
}