[aio2]

Are you talking about the thing Chrome does with it's tabs where you can put them together in sections and give them a colour and name?

[ronjouch]

Not OP, but yes for sure.

Most importantly, it lets you collapse/expand groups with just a click. Makes for a fluid built-in no-frills "putting project A tabs aside to work on project B while keeping tabs ordering and grouping, without the extra friction of bookmarks or profiles" workflow.

[smcleod]

Not OP either but yes - that is exactly what I want!