That has been the best solution so far for vertical tabs but grouping needs some work.

but to be clear it is not great compared to edge.

Edge's vertical tabs and grouping. Every solution on Firefox feels half-baked.

Ohh yes sleeping tabs is great too.

For me, Edge's vertical tabs and grouping is so seamless that it is necessary for my workflow. I have tried so many alternatives on Firefox, but there is always something that makes it feel so half-baked.

Really, the only option. Either more pay or more free time. The amount of savings in not having to commute means going back to the office is a pay cut.