Improved responsiveness on macOS during high CPU usage.Fixed an issue that could slow down Firefox startup.Improved performance on high-refresh rate monitors with 120Hz or more.Activate the toggle button to set the preference to FALSE.Search for the preference _navigation.Select 'Accept the Risk and Continue' if the warning page is displayed.Load about:config in the Firefox address bar.Firefox users who prefer the old behavior, the switching between the address bar and the Search bar, may restore it in the following way: