Examine source code of Techno Minimal

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Techno Minimal",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(38, 38, 34, 0.5)",
      "toolbar_text": "rgb(154, 150, 142)",
      "frame": "rgb(199, 202, 216)",
      "tab_background_text": "rgb(154, 150, 142)",
      "toolbar_field": "rgba(36, 38, 38, 0.46)",
      "toolbar_field_text": "rgb(119, 116, 111)",
      "tab_line": "rgba(240, 163, 12, 0.52)",
      "popup": "rgb(52, 51, 49)",
      "popup_text": "rgb(183, 183, 176)",
      "button_background_hover": "rgba(237, 248, 255, 0.39)",
      "frame_inactive": "rgb(180, 180, 170)",
      "icons_attention": "rgb(180, 180, 170)",
      "icons": "rgb(180, 180, 170)",
      "popup_border": "rgba(73, 73, 86, 0)",
      "tab_background_separator": "rgba(150, 150, 160, 0)",
      "tab_selected": "rgba(167, 164, 155, 0.16)",
      "tab_text": "rgba(180, 180, 170, 0.94)",
      "toolbar_bottom_separator": "rgba(150, 150, 160, 0)",
      "toolbar_field_border_focus": "rgba(21, 21, 16, 0.02)",
      "toolbar_field_focus": "rgba(88, 86, 83, 0.04)",
      "toolbar_top_separator": "rgba(125, 125, 122, 0.47)",
      "toolbar_vertical_separator": "rgba(150, 150, 160, 0.1)",
      "tab_loading": "rgba(240, 163, 12, 0.52)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4ff479ce-98f7-4d28-8695-058d4068c699}"
    }
  }
}