Examine source code of Northbound Paper Atlas

{
  "manifest_version": 2,
  "name": "Northbound Paper Atlas",
  "version": "1.0",
  "description": "A theme shaped by the feeling of printed pages, faded maps, and cool northern light. Calm hues and subtle contrast support long reading sessions.",
  "theme": {
    "colors": {
      "frame": "#e5e1d8",
      "tab_background_text": "#2b2b2b",
      "toolbar": "#f1ede4",
      "toolbar_text": "#2b2b2b",
      "toolbar_field": "#ffffff",
      "toolbar_field_text": "#2b2b2b",
      "tab_line": "#9aa3ad"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{370f469b-cb49-463a-b5f9-7edd584f068b}"
    }
  }
}