Examine source code of Threads in glass

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Threads in glass",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(208, 203, 215, 0.5)",
      "toolbar_text": "rgb(13, 4, 47)",
      "frame": "rgb(13, 4, 47)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(236, 236, 236, 0.75)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(201, 195, 221)",
      "popup": "rgba(236, 236, 236, 0.75)",
      "popup_text": "rgb(9, 0, 48)",
      "tab_loading": "rgb(201, 195, 221)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd11dce3-4124-477e-875e-9095f60aaa7c}"
    }
  }
}