Examine source code of Beautiful Focused Tab

{
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "BeautifulFocusedTab@Godie"
    }
  },
  "name": "Beautiful Focused Tab",
  "description": "light/dark adaptive Theme.",
  "version": "1.0",
  "theme": {
    "colors": {
      "frame": "#d0dbe3",
      "tab_background_text": "#454e54",
      "frame_inactive": "#eff3f5",
      "toolbar": "#ffffff",
      "toolbar_text": "#394146",
      "toolbar_field": "#eff3f5",
      "toolbar_field_text": "#454e54",
      "toolbar_top_separator": "#d3d8db",
      "toolbar_bottom_separator": "#d3d8db",
      "bookmark_text": "#394146",
      "toolbar_field_border": "#50505050",
      "toolbar_field_focus": "#d0dbe3",
      "toolbar_field_border_focus": "#50505030",
      "toolbar_field_highlight": "#0060dfc0",
      "toolbar_field_highlight_text": "#fefefe",
      "toolbar_field_text_focus": "#454e54",
      "toolbar_vertical_separator": "#bfced9",
      "button_background_hover": "#afc2cf",
      "button_background_active": "#0060df80",
      "icons": "#2e3438",
      "icons_attention": "#5021ff",
      "ntp_background": "#eff3f5",
      "ntp_text": "#454e54",
      "ntp_card_background": "#f9f9f9",
      "popup": "#eff3f5",
      "popup_text": "#2e3438",
      "popup_border": "#50505050",
      "popup_highlight": "#0060dfc0",
      "sidebar": "#eff3f5",
      "sidebar_text": "#2e3438",
      "sidebar_border": "#d0dbe3",
      "sidebar_highlight": "#0060df",
      "sidebar_highlight_text": "#fefefe",
      "tab_selected": "#0060df80",
      "tab_line": "#d0dbe3",
      "tab_loading": "#000000",
      "tab_text": "#101019",
      "tab_attention_dot": "#5f33ff"
    }
  },
  "dark_theme": {
    "colors": {
      "frame": "#030615",
      "tab_background_text": "#bbc1c9",
      "frame_inactive": "#12161c",
      "toolbar": "#252836",
      "toolbar_text": "#b7bec8",
      "toolbar_field": "#35394b",
      "toolbar_field_text": "#eaeaea",
      "toolbar_top_separator": "#030615",
      "toolbar_bottom_separator": "#171a28",
      "bookmark_text": "#b7bec8",
      "toolbar_field_border": "#3f445a",
      "toolbar_field_focus": "#3f445a",
      "toolbar_field_border_focus": "#3f445a",
      "toolbar_field_highlight": "#5f33ff",
      "toolbar_field_highlight_text": "#ffffff",
      "toolbar_field_text_focus": "#eaeaea",
      "toolbar_vertical_separator": "#30363d",
      "button_background_hover": "#484d65",
      "button_background_active": "#5021ff",
      "icons": "#d5dadd",
      "icons_attention": "#5021ff",
      "ntp_background": "#202331",
      "ntp_text": "#e4e8ec",
      "ntp_card_background": "#343745",
      "popup": "#171b1f",
      "popup_text": "#ffffff",
      "popup_border": "#7c8c9c70",
      "popup_highlight": "#5f33ff",
      "sidebar": "#282c3e",
      "sidebar_text": "#b7bec8",
      "sidebar_border": "#2a2d3c",
      "sidebar_highlight": "#5021ff",
      "sidebar_highlight_text": "#fefefe",
      "tab_selected": "#5021ff99",
      "tab_line": "#5021ff",
      "tab_loading": "#c6c9d0",
      "tab_loading_inactive": "#5021ff90",
      "tab_text": "#ffffff",
      "tab_attention_dot": "#5f33ff"
    }
  }
}