everything is ok in fullscreen mode, but i want same in regular using :(

For chrome, right click on the empty tab area, uncheck 'using system titlebar';

For firefox, right click on the toolbar, select 'customize toolbar'. Uncheck the titlbar option at the bottom;

For other applications, create folders：

The designers insist on this

solution here https://bbs.deepin.org/en/post/221063

右键点击标签空白处，把使用系统标题栏和边框去掉就可以了。懒得使用英文，你自己猜我在说啥。