After successfully installing the Chrome extension, you’ll notice a Dex icon next to Instagram profiles when browsing Instagram on the web. Clicking this button will either add the profile to Dex or link it to an existing Instagram contact

If the Dex button does not pop up immediately, try refreshing the pageβ€”this will usually allow the overlay to pop back up on the screen!
When the sidebar pops up, you can also schedule Keep-in-touch reminders, last interaction, descriptions, and events without ever leaving the LinkedIn app!