Examine source code of Dark Logo Ultrawide

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Logo Ultrawide",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(21, 20, 19, 0.02)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(214, 205, 197)",
      "toolbar_field": "rgb(32, 31, 30)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(234, 135, 6)",
      "popup": "rgb(17, 17, 16)",
      "popup_text": "rgb(225, 223, 222)",
      "icons": "rgb(255, 255, 255)",
      "tab_background_separator": "rgba(21, 20, 19, 0.5)",
      "tab_selected": "rgb(77, 61, 51)",
      "toolbar_vertical_separator": "rgb(139, 107, 87)",
      "tab_loading": "rgb(234, 135, 6)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff24dfc1-f5c7-4093-9e0b-04bd9307cf3c}"
    }
  }
}