URL: https://mail.google.com/mail/u/0/#inbox/FMfcgxmZVXvsJqzZdLvFmZnrwZLFkjnB

Browser / Version: Firefox 59.0
Operating System: Ubuntu
Tested Another Browser: No

Problem type: Design is broken
Description: Scrollbar appears on Google Calendar appointment widget
Steps to Reproduce:
In Google Calendar (calendar.google.com):

1. Open Google Calendar using the same Gmail account.
2. Add a new appointment with long title, approx. in 50 characters.
3. Save appointment

In Gmail (mail.google.com):

1. Log in to Gmail.
2. Switch to the new layout/version of Gmail.
3. Open the Google Calendar sidebar on the right page
4. Click on the appointment created on the previous steps
5. Observe the presence of scrollbar.
   

From webcompat.com with ❤️