"Something like it": https://github.com/denschub/firefox-tabgroups https://github.com/denschub/firefox-tabgroups https://github.com/kesselborn/conex https://gi

"Something like it": https://github.com/denschub/firefox-tabgroups https://github.com/denschub/firefox-tabgroups https://github.com/kesselborn/conex https://github.com/kesselborn/conex