For example, if we want to do a new Google search or something similar in the browser app of the Xiaomi smartphone, we don't have to leave or close the current page, we simply add a new tab to browse multiple web pages.

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

Xiaomi Instructions