Examine source code of Simply Dark Geometry

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Simply Dark Geometry",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-030-0f935cfde055600d01a959c5c15353de.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(12, 16, 23, 0.8)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 6, 13)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgb(0, 6, 13)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(214, 157, 208, 0.7)",
      "popup": "rgb(32, 42, 62)",
      "popup_text": "rgb(215, 226, 239)",
      "tab_selected": "rgb(13, 23, 48)",
      "tab_loading": "rgba(214, 157, 208, 0.7)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{25f8d10e-5b3a-4fd2-b915-a21685a7ffc6}"
    }
  }
}