I don't think that's the whole story. Chrome was more user friendly from the beginning. It took FF years to drop the rigid, Windows XP style UI and become more user friendly. At the same time, FF doesn't offer the same level of syncing your data across all your devices like Chrome does. And when it comes to system resources, say what you want about Chrome's tab memory management, but FF on macOS is not a pleasant experience either (extensive CPU usage and heating problems).
I have tried to switch back to FF (and even to Edge), but every time I realize Chrome - despite all its problems - is a much smoother experience. YMMV.