Alternative to Tab Mix Plus in Firefox 57 (Firefox Quantum).

So, the much anticipated Firefox Quantum is among us and amazes us with its lightning speed but also make many many people so sad because of the definitive loss of legacy (XUL – XML User Interface Language) extensions support in favor of the new Web extensions. Among the most useful “legacy” plugins I am now missing, Tab Mix Plus is definitely the first on the list.

I can’t believe there’s no way to have multi-row tabs in the new Firefox, i.e. tabs that arrange on multiple rows when their number grows. I think that is an essential feature to many tab-addicted people around here.