Examine source code of Nebula 2 Purple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nebula 2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(32, 32, 32)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(41, 41, 41)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(41, 41, 41)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(132, 31, 142)",
      "popup": "rgb(41, 41, 41)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(132, 31, 142)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9b411759-4e90-4a5f-9b35-d98c1f58ab8e}"
    }
  }
}