Actually for some reason I cant prefer all that flashing buttons at all, visually its good to have some highlight of what is/will be selected, but I cant imagin

Actually for some reason I cant prefer all that flashing buttons at all, visually its good to have some highlight of what is/will be selected, but I cant imagine messing around with the interface if the UI is like that. Just swipe over the menu, its simply to much contrasts and far away from being gently to the eyes. I also don't want to imagine that with a darker theme (if it cant be customized). And again minimalistic and ribbon like menus what was the worst feature introduced in some more or less modern applications (on windows). I want to see a menu for several reasons (perhaps a long time user habbit) but, please, dont remove that if I dont ask for that. Just noticing the min, max and closing button on the top left(?) of the main window - I really really hope that this is only for preview. In addition, will there by any chance a way to customize the colors used for general UI elements (browser textboxes, find dialog, titlebar) besides the system one? For example to allow the use of theme colors over the system ones. Changeable dialog colors would also be warmly welcomed.