Examine source code of ocean foam

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "ocean",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(65, 112, 103)",
      "toolbar_text": "rgb(255, 253, 246)",
      "frame": "rgb(20, 57, 53)",
      "tab_background_text": "rgb(212, 219, 219)",
      "toolbar_field": "rgb(23, 34, 35)",
      "toolbar_field_text": "rgb(253, 252, 247)",
      "tab_line": "rgba(20, 57, 53, 0.76)",
      "popup": "rgb(23, 34, 35)",
      "popup_text": "rgb(254, 253, 248)",
      "button_background_active": "rgba(29, 33, 35, 0.74)",
      "button_background_hover": "rgba(0, 0, 0, 0.29)",
      "frame_inactive": "rgb(25, 34, 34)",
      "icons_attention": "rgb(255, 201, 91)",
      "icons": "rgb(255, 254, 251)",
      "ntp_background": "rgb(39, 44, 46)",
      "ntp_text": "rgb(5, 14, 15)",
      "popup_border": "rgba(90, 120, 114, 0)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgba(140, 235, 227, 0.22)",
      "sidebar_border": "rgb(75, 90, 87)",
      "sidebar_highlight_text": "rgb(27, 30, 30)",
      "sidebar_highlight": "rgb(172, 202, 193)",
      "sidebar_text": "rgb(248, 247, 241)",
      "sidebar": "rgb(23, 34, 35)",
      "tab_background_separator": "rgb(255, 252, 236)",
      "tab_loading": "rgb(98, 135, 127)",
      "tab_selected": "rgba(88, 143, 133, 0.32)",
      "tab_text": "rgb(248, 247, 241)",
      "toolbar_bottom_separator": "rgb(65, 112, 103)",
      "toolbar_field_border_focus": "rgba(0, 0, 0, 0)",
      "toolbar_field_border": "rgb(65, 112, 103)",
      "toolbar_field_focus": "rgb(23, 34, 35)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgba(192, 237, 227, 0.29)",
      "toolbar_field_separator": "rgb(255, 255, 255)",
      "toolbar_field_text_focus": "rgb(255, 252, 249)",
      "toolbar_top_separator": "rgb(61, 115, 105)",
      "toolbar_vertical_separator": "rgb(237, 200, 82)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{da3f70ad-d58c-4b31-82b2-45d433d938f9}"
    }
  }
}