A method for co-browsing, including establishing a first communication session between a first web browser of first device and a first content provider over a network to deliver content. A co-browse extension is accessed on the first web browser to enable multi-domain co-browsing functionality on the first web browser. A second communication session is established between the first web browser and a co-browse communication server to initiate and join the first web browser in a co-browse session, wherein the session comprises a co-browse session identifier, wherein the first device acts as a host. A third communication session is established between a second web browser of a second device and the co-browse communication server to join the second web browser into the co-browse session, such that content at the first web browser is delivered to the second web browser of the second device via the co-browse communication server.