Examine source code of BrighterFox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "FlashyFox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-037-b73f9b34467ba541de861f5b4c0c6316.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(26, 7, 84)",
      "toolbar_text": "rgb(218, 67, 67)",
      "frame": "rgb(63, 25, 161)",
      "tab_background_text": "rgb(218, 169, 67)",
      "toolbar_field": "rgb(50, 38, 102)",
      "toolbar_field_text": "rgb(218, 169, 67)",
      "tab_line": "rgb(218, 67, 67)",
      "popup": "rgb(19, 7, 84)",
      "popup_text": "rgb(180, 121, 24)",
      "tab_loading": "rgb(218, 67, 67)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3a725c58-d7a5-483c-b7e4-70ef4016850a}"
    }
  }
}