Examine source code of Black Pastel Vibe

{
  "manifest_version": 2,
  "version": "3.0",
  "name": "Black Pastel Vibe",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(244, 252, 255)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(214, 214, 214)",
      "popup": "rgb(244, 252, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "icons_attention": "rgb(0, 0, 0)",
      "popup_border": "rgb(244, 252, 255)",
      "tab_selected": "rgb(244, 252, 255)",
      "toolbar_bottom_separator": "rgb(223, 223, 223)",
      "toolbar_field_border": "rgb(214, 214, 214)",
      "toolbar_top_separator": "rgb(236, 236, 236)",
      "tab_loading": "rgb(214, 214, 214)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{57d2dfb3-a870-48aa-9510-940b7031d882}"
    }
  }
}