Examine source code of Dark Gray (Edge-like)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Gray (Edge-like)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(94, 97, 102)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(62, 63, 67)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgb(62, 63, 67)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(94, 97, 102)",
      "popup": "rgba(62, 63, 67, 0.93)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(94, 97, 102)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{16c5e688-ddb4-42ce-8d89-bba646a3a947}"
    }
  }
}