Question: Using SSL/TLS client certificates stored in web browser for authentication against MQTT broker

It's very common to use TLS client certificates to connect to and authenticate against MQTT brokers - especially when roles are involved and the one in question has higher privileges / permissions (such as can subscribe and publish to everything), e.g. signed by a dedicated admin-CA or alike.

Since most web browsers can store TLS client certificates to (normally) authenticate against web servers, I wonder if the paho-mqtt javascript library can also use such certificates in order to authenticate against the MQTT broker.