Examine source code of Marron

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ocre days",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-034-e0dfa84411058d2e5627f19f1ea501ca.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(179, 135, 47)",
      "toolbar_text": "rgb(251, 217, 0)",
      "frame": "rgb(64, 56, 13)",
      "tab_background_text": "rgb(244, 220, 185)",
      "toolbar_field": "rgb(244, 233, 191)",
      "toolbar_field_text": "rgb(57, 48, 16)",
      "tab_line": "rgb(255, 182, 30)",
      "popup": "rgb(100, 82, 63)",
      "popup_text": "rgb(252, 237, 204)",
      "button_background_active": "rgb(75, 45, 13)",
      "button_background_hover": "rgb(132, 97, 59)",
      "frame_inactive": "rgb(115, 75, 55)",
      "icons_attention": "rgb(117, 218, 48)",
      "icons": "rgb(17, 243, 252)",
      "ntp_background": "rgb(191, 154, 36)",
      "ntp_text": "rgb(140, 27, 111)",
      "popup_border": "rgb(78, 16, 0)",
      "popup_highlight_text": "rgb(255, 193, 27)",
      "popup_highlight": "rgb(201, 255, 46)",
      "sidebar_border": "rgb(115, 102, 75)",
      "sidebar_highlight_text": "rgb(132, 2, 149)",
      "sidebar_highlight": "rgb(93, 69, 17)",
      "sidebar_text": "rgb(36, 106, 255)",
      "tab_loading": "rgb(255, 182, 30)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6ac5918d-3160-4bac-a780-5fd523eda85d}"
    }
  }
}