Alternatively, you can try to disconnect from your internet source and reconnect, then try to download the chrome file again. Using antivirus or firewall on your computer can also cause downloads ...

Once you have it all set up, you need to open it and open the Chrome Web Store. Look up for the extension that you need to download and select it. It will take you to the extension’s download page.

After you've found something you like, install the extension by opening it in the Chrome Web Store and selecting the Add to ...