Examine source code of Dreary Flower

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dreary Flower",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(5, 31, 49)",
      "toolbar_text": "rgb(227, 233, 245)",
      "frame": "rgb(7, 12, 15)",
      "tab_background_text": "rgb(226, 212, 212)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(123, 127, 204)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(139, 192, 193)",
      "popup_text": "rgb(98, 102, 183)",
      "button_background_hover": "rgb(221, 146, 204)",
      "frame_inactive": "rgb(102, 79, 123)",
      "icons_attention": "rgb(124, 105, 208)",
      "ntp_background": "rgb(229, 90, 105)",
      "ntp_text": "rgb(37, 222, 32)",
      "popup_border": "rgb(105, 216, 241)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{443cd601-7909-4de0-a718-8fda923e1618}"
    }
  }
}