Examine source code of LifestreamDark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Lifestream",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(11, 19, 19)",
      "toolbar_text": "rgb(64, 131, 131)",
      "frame": "rgb(2, 3, 3)",
      "tab_background_text": "rgb(139, 238, 238)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(54, 123, 119)",
      "tab_line": "rgb(66, 111, 121)",
      "popup": "rgb(7, 8, 10)",
      "popup_text": "rgb(54, 125, 108)",
      "tab_loading": "rgb(66, 111, 121)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{86072b00-79cf-4ba4-99e3-84801d5022c1}"
    }
  }
}