Disagree... Chrome replaced IE. Firefox is trying to get back the users it has lost over the years. We're really at the same two player matchup (with a similar underlying engine).
I'm currently on Quantum after having given up on Firefox for a couple of years. The differences between the old and new Firefox have won me over again.
If there is a war, it is a search engine and ecosystem war. The search engine is now hidden behind voices like Siri, Alexa, Google Assistant, and Cortana. The ecosystem, hidden behind app stores and closed hardware devices.
