Add "Close Others" Button into toolbar. All tabs except the current tab will be closed. Close Left: https://www.crxsoso.com/webstore/detail/close-left/gdpopcppmglkiodhjobnjbogcoacgkoa Close Right: https://www.crxsoso.com/webstore/detail/close-right/npemobdkdcknhfaiioheeffincgpgafj