{
  "browser.tabs.groups.enabled" = true; # https://support.mozilla.org/en-US/kb/tab-groups
  "browser.tabs.groups.smart.enabled" = true; # https://support.mozilla.org/en-US/kb/tab-groups
  "browser.toolbars.bookmarks.visibility" = "never"; # don't show bookmark tabs
  "browser.urlbar.trimURLs" = false; # show the complete URL
  "sidebar.main.tools" = "aichat,history,bookmarks";
  "sidebar.revamp" = true;
  "sidebar.verticalTabs" = true; # vertical tabs
}