Examine source code of angelkin

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "angelkin",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(226, 250, 247)",
      "toolbar_text": "rgb(2, 180, 196)",
      "frame": "rgb(241, 247, 170)",
      "tab_background_text": "rgb(0, 76, 99)",
      "toolbar_field": "rgb(253, 255, 220)",
      "toolbar_field_text": "rgb(0, 5, 5)",
      "tab_line": "rgb(0, 249, 255)",
      "popup": "rgb(244, 249, 188)",
      "popup_text": "rgb(67, 146, 164)",
      "button_background_hover": "rgb(153, 248, 248)",
      "icons": "rgb(196, 173, 2)",
      "tab_loading": "rgb(6, 241, 232)",
      "tab_selected": "rgb(3, 127, 158)",
      "tab_text": "rgb(226, 250, 247)",
      "toolbar_field_highlight_text": "rgb(4, 133, 233)",
      "toolbar_field_highlight": "rgb(255, 237, 37)",
      "toolbar_field_separator": "rgb(6, 226, 238)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fd2b5f0c-53f6-467b-97ab-f4eb7cf2bd16}"
    }
  }
}