Method 1:
If Unfriend-Checker Chrome Extension is visible at the top of the browser, you can simply right-click on the icon and select “Remove from Chrome”.

right-click on the icon

Method 2:
Open the browser and click on the three-dot menu button located in the top right-hand corner.

three-dot menu button

Select the more “More tools” option.
Select the “Extensions” option.
Scroll down until you find Unfriend-Checker Chrome Extension, click on “REMOVE”.