Examine source code of Sapphire Grace

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Sapphire Grace v1.1",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(20, 20, 28)",
      "toolbar_text": "rgb(206, 204, 206)",
      "frame": "rgb(26, 51, 105)",
      "tab_background_text": "rgb(206, 204, 206)",
      "toolbar_field": "rgb(30, 40, 68)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(0, 186, 255)",
      "popup": "rgb(20, 20, 28)",
      "popup_text": "rgb(206, 204, 206)",
      "button_background_hover": "rgb(26, 51, 105)",
      "icons_attention": "rgb(0, 186, 255)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(36, 41, 51)",
      "ntp_text": "rgb(206, 204, 206)",
      "popup_border": "rgb(30, 40, 68)",
      "tab_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(0, 186, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b10588c0-782d-4a06-967c-176b6866661d}"
    }
  }
}