Examine source code of BFDI Space Theme

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "BFDI Space Theme V.2.",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(6, 8, 34, 0.87)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(250, 250, 250)",
      "toolbar_field": "rgba(53, 89, 196, 0.82)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(55, 42, 46, 0.82)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgba(55, 42, 46, 0.82)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a48a452-c771-481d-9b84-15ccc518e508}"
    }
  }
}