new interface how can I change and come back to the original or old with lines above the website, the buttons, the search, etc, it´s very bad for me, I didn´t like it?? it changed today with some update

new interface how can I change and come back to the original or old with lines above the website, the buttons, the search, etc, it´s very bad for me, I didn´t like it?? it changed today with some update