Swipe the Navigation Bar to Switch Tabs in Chrome
Android (5.0+): In Lollipop, Google introduced a new style of tab management that treats individual Chrome tabs as separate apps. If you have on-screen buttons, you can switch between the corresponding tabs by swiping your finger across the navigation bar.
As Android Police shows above, Chrome creates “sibling tabs” when browsing, which are grouped in a task switch menu. You can switch between these tabs by pressing the Back or Multitasking button on the on-screen navigation bar and swiping to the other side. It’s a bit unintuitive and only works on those sibling tabs (so you can’t go back to old tabs or other apps), but it’s a nice quick way to move between tabs in the same browsing session.
Quick tip: switch sibling tabs in Chrome by swiping your finger across the navigation bar Android | Police Android