Examine source code of irish mint

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "irish mint",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-037-b73f9b34467ba541de861f5b4c0c6316.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(164, 255, 167)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(158, 255, 182)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(158, 255, 182)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(158, 255, 182)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6708bdc7-8613-4dd9-ba7f-79c890a35cfe}"
    }
  }
}