Examine source code of Material Incognito based

{
  "manifest_version": 2,
  "version": "1.0.1",
  "name": "Material Incognito based",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(50, 54, 57)",
      "toolbar_text": "rgb(241, 243, 244)",
      "frame": "rgb(15, 16, 17)",
      "tab_background_text": "rgb(189, 193, 198)",
      "toolbar_field": "rgb(32, 33, 36)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(10, 132, 255)",
      "popup": "rgb(32, 34, 36)",
      "popup_text": "rgb(241, 243, 244)",
      "frame_inactive": "rgb(32, 34, 36)",
      "icons": "rgb(219, 216, 237)",
      "icons_attention": "rgb(10, 132, 255)",
      "ntp_background": "rgb(32, 34, 36)",
      "popup_border": "rgba(245, 0, 0, 0)",
      "sidebar_border": "rgb(50, 54, 57)",
      "sidebar": "rgb(32, 34, 36)",
      "tab_loading": "rgb(38, 120, 228)",
      "tab_text": "rgb(241, 243, 244)",
      "toolbar_bottom_separator": "rgb(50, 54, 57)",
      "toolbar_field_border_focus": "rgb(38, 120, 228)",
      "toolbar_field_highlight": "rgb(38, 120, 228)",
      "toolbar_top_separator": "rgba(218, 3, 3, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f5e2ccfa-7997-4f53-8913-e5bbbf37aa11}"
    }
  }
}