Examine source code of CustomPersonasDoesntWork

{
  "theme": {
    "images": {
      "theme_frame": "personas_space_header_lowered_quality.jpg"
    },
    "colors": {
      "frame": "#b2beb5",
      "tab_background_text": "#f2f3f4"
    }
  },
  "version": "2.0",
  "name": "CustomPersonasDoesntWork",
  "manifest_version": 2,
  "description": "Custom Personas Doesn't Work"
}