I've noticed this too. I think it might be a result of the UX. Unscientific of me, but Firefox feels like the buttons directly trigger behavior, the page render

I've noticed this too. I think it might be a result of the UX. Unscientific of me, but Firefox feels like the buttons directly trigger behavior, the page renders as it comes in, and the content is "closer" to the engine somehow. Chrome feels like the buttons signal intents and behavior is orchestrated behind the scenes to feel smooth. They're both good approaches, but Firefox feels more like I'm driving stick, if that makes sense.