1)

Download the test build to your system

2)

You need to extract the test build from the compressed folder

3)

After extracting the folder, go to Google Chrome and click the three dots above the app launcher

4)

Go to "More tools" and select "Extensions"

5)

Turn the Developer mode ON by switching the toggle towards right

6)

From the newly appeared items, select "Load unpacked"

7)

Select the extracted folder

8)

Testing build has been installed successfully

9)

To pin the extension, click the puzzle icon first, and then the pin icon