Open the following link in the Google Chrome browser https://chrome.google.com/webstore/detail/examus/nimiflpndioioljbankkeinmoohhcafa. If the link can't be open in the right way, just copy it to the address bar.
Press the Install button:
When you see the "Install Examus?" pop-up window, click Install an extension:
Wait for the installation process to complete:
After the installation process is complete, a successful installation message and the Examus extension icon will appear in the upper-right corner of the browser:
If you don't see the Examus icon after installation, read this article.
If you have problems installing the extension, try these solutions.
More information about extensions in Chrome: https://support.google.com/chrome_webstore/answer/2664769?hl=ru