Examine source code of EveningFox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "midnightfoxgrey",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(19, 19, 19)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(23, 23, 23)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(25, 25, 25)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(158, 84, 52)",
      "popup": "rgb(21, 21, 21)",
      "popup_text": "rgb(255, 255, 255)",
      "icons": "rgb(255, 255, 255)",
      "ntp_text": "rgb(255, 255, 255)",
      "tab_selected": "rgb(14, 14, 14)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border": "rgb(134, 134, 134)",
      "toolbar_top_separator": "rgb(67, 67, 67)",
      "tab_loading": "rgb(158, 84, 52)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{76f7f062-b92e-44ec-ad61-d1c835fb039c}"
    }
  }
}