Examine source code of Web Developer V1

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Web Developer",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(31, 34, 61, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(19, 29, 39)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgba(19, 29, 39, 0.5)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(4, 31, 57)",
      "popup": "rgba(19, 29, 39, 0.99)",
      "popup_text": "rgb(230, 242, 255)",
      "button_background_active": "rgb(140, 128, 40)",
      "button_background_hover": "rgb(69, 94, 119)",
      "frame_inactive": "rgb(255, 255, 255)",
      "icons_attention": "rgb(0, 128, 255)",
      "icons": "rgb(180, 217, 255)",
      "ntp_background": "rgb(19, 29, 39)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(192, 169, 2)",
      "popup_highlight_text": "rgba(19, 29, 39, 0.98)",
      "popup_highlight": "rgb(109, 182, 255)",
      "sidebar_border": "rgb(19, 29, 39)",
      "sidebar_highlight_text": "rgb(19, 29, 39)",
      "sidebar_highlight": "rgb(219, 192, 0)",
      "sidebar_text": "rgb(226, 237, 251)",
      "sidebar": "rgb(19, 29, 39)",
      "tab_background_separator": "rgb(109, 182, 255)",
      "tab_loading": "rgb(70, 103, 136)",
      "tab_selected": "rgba(44, 65, 86, 0.95)",
      "tab_text": "rgb(30, 199, 255)",
      "toolbar_bottom_separator": "rgb(19, 29, 39)",
      "toolbar_field_separator": "rgb(227, 239, 255)",
      "toolbar_top_separator": "rgba(19, 29, 39, 0)",
      "toolbar_vertical_separator": "rgb(227, 239, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cac560a3-c749-435d-b573-27a925b41ba4}"
    }
  }
}