Examine source code of Cherry Box

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cherry",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(124, 34, 13)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(24, 10, 6)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgb(8, 8, 8)",
      "toolbar_field_text": "rgb(249, 83, 83)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(37, 37, 46)",
      "popup_text": "rgb(215, 226, 239)",
      "button_background_active": "rgb(243, 2, 2)",
      "button_background_hover": "rgb(255, 0, 0)",
      "frame_inactive": "rgb(255, 0, 0)",
      "icons_attention": "rgb(255, 0, 0)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(49, 48, 48)",
      "ntp_text": "rgb(247, 242, 242)",
      "popup_border": "rgb(255, 0, 0)",
      "popup_highlight_text": "rgb(255, 0, 0)",
      "popup_highlight": "rgb(255, 0, 0)",
      "sidebar_border": "rgb(255, 0, 0)",
      "sidebar_highlight_text": "rgb(255, 0, 0)",
      "sidebar_highlight": "rgb(255, 0, 0)",
      "sidebar_text": "rgb(255, 0, 0)",
      "tab_loading": "rgb(251, 32, 0)",
      "toolbar_vertical_separator": "rgb(247, 244, 244)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{83b6e0a7-9899-4512-a232-62cd75e82d65}"
    }
  }
}