FullContact for Gmail lets you view enriched context about your contacts without leaving your inbox. It displays available contact information of the sender along with other information like social media profile urls, position at the company, etc.
Just hover your mouse over sender’s email ID or open the email, all the contact information will be displayed on the right panel.
This extension will be very helpful for editing and saving your contact information without leaving your inbox. You can quickly add, favorite your contacts, copy contact information to the clipboard.
Supports both Gmail for web and Inbox by Gmail. It also has apps for iOS, Android, Mac, and Web.