Examine source code of Bubbly Blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Bubbly Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(138, 204, 255)",
      "toolbar_text": "rgb(14, 150, 255)",
      "frame": "rgb(105, 159, 204)",
      "tab_background_text": "rgb(58, 98, 130)",
      "toolbar_field": "rgb(98, 155, 199)",
      "toolbar_field_text": "rgb(34, 84, 123)",
      "tab_line": "rgb(58, 98, 130)",
      "popup": "rgb(35, 63, 86)",
      "popup_text": "rgb(138, 204, 255)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5b66fd53-93db-41ed-8b2b-102588373676}"
    }
  }
}