Examine source code of Halo Infinite

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Halo Infinite",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(139, 139, 151, 0.86)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(57, 58, 64)",
      "tab_background_text": "rgb(2, 10, 26)",
      "toolbar_field": "rgba(54, 58, 89, 0.48)",
      "toolbar_field_text": "rgb(230, 234, 240)",
      "tab_line": "rgba(147, 156, 200, 0.71)",
      "popup": "rgb(92, 95, 140)",
      "popup_text": "rgb(223, 230, 237)",
      "tab_loading": "rgba(147, 156, 200, 0.71)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9974a4f0-920e-4a58-b3a2-8c590b7dd185}"
    }
  }
}