10 Hidden Gestures for Google Chrome on iPhone
Swipe Down to Close Tabs, Reload, and Open Tabs
Chrome has a convenient shortcut for quickly closing the current tab, reloading the open web page, or opening a new tab. Just touch your screen and swipe downward with your finger. By default, the “Reload” shortcut in the center of the screen will be focused. (If you’re in the middle of a web page, you’ll have to scroll back up to the top of the page first.)
To close the tab, move your finger to the right to focus “Close Tab.” To open a new tab, move your finger to the left to focus “Open Tab.” Release your finger to trigger the selected action.