Examine source code of Miku V1

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Miku V1",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 188, 212)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(0, 149, 168)",
      "tab_background_text": "rgb(215, 215, 215)",
      "toolbar_field": "rgba(0, 149, 168, 0.8)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(245, 0, 159)",
      "popup": "rgba(180, 0, 117, 0.79)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgba(0, 149, 168, 0.68)",
      "ntp_background": "rgb(0, 149, 168)",
      "ntp_text": "rgb(180, 0, 117)",
      "popup_border": "rgba(245, 0, 159, 0)",
      "sidebar_border": "rgba(0, 241, 255, 0)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(0, 156, 176)",
      "tab_selected": "rgba(245, 0, 159, 0.5)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(0, 199, 225)",
      "tab_loading": "rgb(245, 0, 159)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d54937e2-3a0b-4dd4-89ee-3cde0734aa0e}"
    }
  }
}