Examine source code of RevontuletReduxV2

{
  "manifest_version": 2,
  "version": "2.3",
  "name": "RevontuletReduxV2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom",
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.8)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(255, 0, 125)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(65, 0, 31, 0.15)",
      "toolbar_field_text": "rgb(0, 235, 255)",
      "tab_line": "rgb(255, 0, 125)",
      "popup": "rgba(65, 0, 31, 0.85)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 0, 125)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{75febad9-af43-4743-b56d-c7a27139b818}"
    }
  }
}