Mostly I like to use figma on browser (with fullscreen) just because it has more space, because there is no tabbar on browser.
So, my suggestion is, there should be an option to hide topbar (or tabbar) on figma app, so users on smaller screen like macbook air will have more canvas view.
Most people keep open a single tab, Why to waste entire screen width with tabbar?.
Something like “Dock” on mac os. You can hide it, but when mouse hovers on that area it will be shown.