Download the test build to your system
You need to extract the test build from the compressed folder
After extracting the folder, go to Google Chrome and click the three dots above the app launcher
Go to "More tools" and select "Extensions"
Turn the Developer mode ON by switching the toggle towards right
From the newly appeared items, select "Load unpacked"
Select the extracted folder
Testing build has been installed successfully
To pin the extension, click the puzzle icon first, and then the pin icon