A master and a slave computing device within a co-browsing session can be identified. The devices can be associated with a first Unified Resource Identifier (URI) where a portion of the URI is a fully qualified domain name of a Domain Name System (DNS) hierarchy. The devices can be associated with a co-browsing application. A request associated with a second URI from the master computing device can be detected. The second URI can share a root domain with the first URI. A portion of a master artifact associated with the master device can be conveyed to the slave device. The master artifact can be associated with state information of the session. A portion of a slave artifact linked to the slave device can be modified with the portion of the master artifact. The devices can be navigated to the second URI in response to the request.