Examine source code of Software Engineer Theme

{
  "manifest_version": 2,
  "name": "Software Engineer Theme",
  "version": "1.0.1",
  "description": "A highly customized dark IDE-inspired theme using every Firefox theme parameter for advanced customization.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4e4be88-16b7-43b3-b244-fb0eef7e243e}"
    }
  },
  "theme": {
    "images": {
      "theme_frame": "images/theme_frame.svg",
      "additional_backgrounds": [
        "images/additional_bg_center.svg",
        "images/additional_bg_left.svg",
        "images/additional_bg_right.svg"
      ]
    },
    "colors": {
      "frame": "#0d1117",
      "frame_inactive": "#161b22",
      "tab_background_text": "#8b949e",
      "tab_text": "#e6edf3",
      "tab_line": "#58a6ff",
      "tab_loading": "#3fb950",
      "tab_selected": "#21262d",
      "toolbar": "#161b22",
      "toolbar_text": "#e6edf3",
      "bookmark_text": "#e6edf3",
      "toolbar_field": "#0d1117",
      "toolbar_field_text": "#e6edf3",
      "toolbar_field_focus": "#161b22",
      "toolbar_field_text_focus": "#58a6ff",
      "toolbar_field_border": "#30363d",
      "toolbar_field_border_focus": "#58a6ff",
      "toolbar_field_highlight": "rgba(56, 139, 253, 0.25)",
      "toolbar_field_highlight_text": "#e6edf3",
      "toolbar_top_separator": "#21262d",
      "toolbar_bottom_separator": "#21262d",
      "toolbar_vertical_separator": "#30363d",
      "button_background_hover": "#30363d",
      "button_background_active": "#21262d",
      "icons": "#8b949e",
      "icons_attention": "#d29922",
      "popup": "#161b22",
      "popup_text": "#e6edf3",
      "popup_border": "#30363d",
      "popup_highlight": "#21262d",
      "popup_highlight_text": "#58a6ff",
      "ntp_background": "#0d1117",
      "ntp_card_background": "#161b22",
      "ntp_text": "#e6edf3",
      "sidebar": "#161b22",
      "sidebar_text": "#e6edf3",
      "sidebar_highlight": "#21262d",
      "sidebar_highlight_text": "#58a6ff",
      "sidebar_border": "#30363d"
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center",
        "left top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat-y",
        "repeat-y"
      ],
      "color_scheme": "dark",
      "content_color_scheme": "dark"
    }
  }
}