Examine source code of Kitty_4

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Kitty_4",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(0, 128, 138)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(0, 0, 0, 0.4)",
      "tab_line": "rgba(0, 0, 0, 0)",
      "popup": "rgb(101, 137, 138)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgba(74, 141, 147, 0.45)",
      "button_background_hover": "rgba(74, 141, 147, 0.2)",
      "icons_attention": "rgba(0, 128, 138, 0.45)",
      "popup_highlight": "rgba(226, 212, 213, 0)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(45, 119, 121)",
      "tab_loading": "rgb(0, 255, 239)",
      "tab_selected": "rgba(180, 213, 213, 0.85)",
      "toolbar_bottom_separator": "rgba(128, 128, 128, 0.5)",
      "toolbar_field_border_focus": "rgba(64, 126, 122, 0.25)",
      "toolbar_field_border": "rgba(255, 255, 255, 0.5)",
      "toolbar_field_focus": "rgb(215, 234, 233)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgba(255, 243, 254, 0.05)",
      "toolbar_field_separator": "rgb(0, 0, 0)",
      "toolbar_field_text_focus": "rgba(0, 0, 0, 0.35)",
      "toolbar_top_separator": "rgba(0, 250, 255, 0)",
      "toolbar_vertical_separator": "rgba(255, 255, 255, 0.75)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e563eea8-c664-42dd-ac3b-6d4e66643a7e}"
    }
  }
}