How to auto-hide bookmarks bar in Chrome?
Solution 1:
Try control + Shift + B, which hides bookmark bar when any website is opened and only shows in a new tab or home page.
Solution 2:
If you have a Windows computer, you can make the browser full-screen with F11. This auto-hides the address bar and bookmark bar and when you move your mouse to the top of the screen, it will show up again. However, both the address bar and bookmark bar will show up; as far as I know there is no way to make them show separately.