Examine source code of Quiet Dusk

{
  "manifest_version": 2,
  "name": "Quiet Dusk",
  "version": "1.0",
  "description": "A calm Firefox theme using soft dark tones, designed for comfortable everyday browsing.",
  "theme": {
    "colors": {
      "frame": "#2c2f36",
      "toolbar": "#3a3f46",
      "tab_text": "#e6e6e6",
      "toolbar_text": "#f2f2f2",
      "popup": "#2f333a",
      "popup_text": "#ffffff"
    }
  },
  "applications": {
    "gecko": {
      "id": "quietdusk@addons.mozilla.org"
    }
  }
}