Open your Google Chrome web browser and access the Chrome Web store.
In the Chrome Web store, search for « Andaman7 » in the search bar (upper left of the screen). You will see the following result:
Click on the thumbnail of the Andaman7 extension. The detailed information of the extension will be displayed:
Click on "Add to Chrome" (upper right of the screen) to add the extension to your Google Chrome browser.
You should now see the extension's icon in the web browser's navigation bar:
If you already have several other extensions installed, the icon of Andaman7's extension might not be visible. You will need to click on the three vertical dots (far right of your navigation bar) to display all extensions.