Examine source code of Reliefox

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Reliefox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(16, 16, 32)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(192, 192, 192)",
      "toolbar_field": "rgba(255, 255, 255, 0.1)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(255, 255, 255, 0)",
      "popup": "rgba(0, 0, 16, 0.95)",
      "popup_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgba(255, 255, 255, 0.1)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(0, 0, 16)",
      "tab_loading": "rgba(0, 128, 255, 0.5)",
      "tab_selected": "rgba(255, 255, 255, 0.2)",
      "toolbar_field_focus": "rgba(39, 39, 55, 0.98)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{35731de2-a639-4e14-9daa-ea7e1387c5a6}"
    }
  }
}