Examine source code of Dark Terminal

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Terminal",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-035-ec6e2e3635b86a13a7ebee9a1390e7e7.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgb(14, 15, 22)",
      "toolbar_field_text": "rgb(77, 219, 10)",
      "tab_line": "rgb(238, 3, 3)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "tab_loading": "rgb(238, 3, 3)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cec61261-f8d2-472a-bc01-e694ca33e719}"
    }
  }
}