From the top of any Calendly page, select Integrations, then Calendly for Chrome.
Select Get Calendly for Chrome and follow the instructions that appear.
If you block third-party cookies in your Chrome settings, you can add an exception for Calendly.
Enter “chrome://settings/content/cookies” into the Chrome browser location bar.
Next to Allow, click Add.
At Site, enter "https://calendly.com", then click Add.