Did you know that the Mac version of Chrome has 2 full-screen modes?
Take a look in the View Menu and you’ll see two optoions: Enter Presentation Mode and Enter Full Screen
Presentation mode (shift-command-F) gives me nearly an extra inch at the top of my MBA 13”. It hides your tabs, omnibar, toolbar and menu bar, showing you just the current tab in full screen. If you hover your mouse near the top of the screen the menu and tabs show after a moment or two.
Full Screen (ctrl-command-F) shows Chrome in the Full Screen - no menu bar, but the tabs, omnibar, and toolbar are there.
I find Presentation Mode very handy when I’m reading, rather than browsing.