Tab previews are in the works for a future release of Mozilla Firefox. In current versions of Firefox you hover your mouse over a non-active tab (i.e. any
I want to view multiple tabs at once, in a split-page view where I can scroll on one tab, then mouse-over to another and start independently scrolling on that one. It's probably the key feature I miss from Vivaldi. Is there some insurmountable obstacle in the engine that prevents implementation, or is it stubborn devs?