Examine source code of dsbm dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "dsbm dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(116, 118, 120, 0.22)",
      "toolbar_text": "rgb(215, 215, 215)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(215, 215, 215)",
      "toolbar_field": "rgb(32, 32, 34)",
      "toolbar_field_text": "rgb(215, 215, 215)",
      "tab_line": "rgba(116, 118, 120, 0.22)",
      "popup": "rgb(56, 56, 57)",
      "popup_text": "rgb(116, 118, 120)",
      "frame_inactive": "rgb(56, 56, 57)",
      "icons_attention": "rgb(56, 56, 57)",
      "ntp_background": "rgba(116, 118, 120, 0.22)",
      "popup_border": "rgb(32, 32, 34)",
      "popup_highlight_text": "rgb(116, 118, 120)",
      "popup_highlight": "rgb(116, 118, 120)",
      "sidebar_border": "rgb(215, 215, 215)",
      "sidebar_highlight": "rgb(116, 118, 120)",
      "sidebar_text": "rgb(116, 118, 120)",
      "sidebar": "rgb(116, 118, 120)",
      "tab_loading": "rgb(0, 0, 0)",
      "tab_selected": "rgba(116, 118, 120, 0.22)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgb(56, 56, 57)",
      "toolbar_field_border": "rgb(116, 118, 120)",
      "toolbar_top_separator": "rgba(116, 118, 120, 0.22)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8d0d3149-63de-421a-bdad-58ceb9947aaf}"
    }
  }
}