Examine source code of Samus Metroid Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Samus Metroid Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.6)",
      "toolbar_text": "rgb(255, 140, 0)",
      "frame": "rgb(5, 5, 5)",
      "tab_background_text": "rgb(27, 255, 0)",
      "toolbar_field": "rgba(114, 114, 114, 0.51)",
      "toolbar_field_text": "rgb(255, 18, 0)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(134, 93, 0)",
      "popup_text": "rgb(3, 255, 0)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{81e1dc6f-fa31-478c-821e-a7edcfa3e1d3}"
    }
  }
}