Examine source code of Hot Red

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Hot Red",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(183, 1, 23)",
      "frame": "rgb(0, 0, 3)",
      "tab_background_text": "rgb(208, 8, 52)",
      "toolbar_field": "rgb(196, 6, 28)",
      "toolbar_field_text": "rgb(13, 13, 14)",
      "tab_line": "rgb(191, 5, 42)",
      "popup": "rgb(7, 7, 7)",
      "popup_text": "rgb(179, 5, 15)",
      "tab_loading": "rgb(191, 5, 42)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4bba6b05-7bfb-4929-9ed9-4d40e5d1dcfe}"
    }
  }
}