Examine source code of Original Microsoft Edge

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Original Microsoft Edge",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(247, 247, 247)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(205, 205, 205)",
      "tab_background_text": "rgb(49, 49, 49)",
      "toolbar_field": "rgba(255, 255, 255, 0.7)",
      "toolbar_field_text": "rgb(49, 49, 49)",
      "tab_line": "rgb(247, 247, 247)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(49, 49, 49)",
      "button_background_hover": "rgb(220, 220, 220)",
      "icons": "rgb(0, 0, 0)",
      "ntp_background": "rgb(247, 247, 247)",
      "ntp_text": "rgb(0, 0, 0)",
      "popup_border": "rgb(255, 255, 255)",
      "popup_highlight_text": "rgb(238, 238, 238)",
      "popup_highlight": "rgb(238, 238, 238)",
      "sidebar_border": "rgb(238, 238, 238)",
      "sidebar_highlight_text": "rgb(238, 238, 238)",
      "sidebar_highlight": "rgb(238, 238, 238)",
      "sidebar_text": "rgb(0, 0, 0)",
      "tab_selected": "rgb(247, 247, 247)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgb(223, 228, 230)",
      "toolbar_field_border_focus": "rgb(165, 187, 238)",
      "toolbar_field_border": "rgb(238, 242, 242)",
      "toolbar_field_focus": "rgb(255, 255, 255)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(33, 120, 210)",
      "toolbar_field_text_focus": "rgb(0, 0, 0)",
      "toolbar_top_separator": "rgb(223, 228, 230)",
      "tab_loading": "rgb(247, 247, 247)"
    }
  }
}