[nilliams]

> From the list of JS libraries they're using alone, I'm guessing it's going to get even fatter and laggier than it already was :(

Why? Only 3 of the 'JS libraries' listed are actual run-time code (React, Redux, Immutable). And React + Immutable are typically paired together specifically for speed optimisation reasons.

> I just want a listview of requests that appears in under a second

I think calling it a listview is a little unfair, and clearly there has to be tool/library cohesion with the rest of the Firefox devtools too, which are also much more than the odd listview.