When browsing the web on our Xiaomi smartphone for a while, we sometimes don't even notice how many tabs we have been opened in the background.
Then we can close all the current tabs at once with a useful feature so we don't have to close them all one by one.

Note: Individual tabs can be closed by tapping on the (X) or by wiping it off to the left or right.

Android 10 (MIUI 12.0)
Step 1:  Open the  Mi Browser app
Step 2:  Tap on  Tabs
Step 3:  Tap on  Close
Step 4:  Tap on  OK
  1. Open the Mi Browser app
  2. Tap on Tabs
  3. Tap on Close
  4. Tap on OK

Xiaomi Instructions