Help page says
Manage how links are handled
Some sites may ask to open special types of links by default. These are called protocol handlers. For example, you can set Opera to open ical: links in Google Calendar’s web app or force mailto: links to open in your email web app. To allow or not allow sites to ask to be the default handlers of specific types of links:
Go to Settings.
Click Advanced in the left sidebar, and click Privacy & security.
Under Privacy and security, click Site settings.
Click Handlers.
At the top, toggle on Allow sites to ask to become default handlers for protocols (recommended).
Click the x next to a handler to remove it.
But the handlers block do not exist anymore.
