Until now, the two features have been limited to the Teams desktop app but they’re becoming available on the browser version of Teams. Microsoft unveiled Together Mode in July as part of its answer to workers across the world staying at home during the pandemic. . The Large Gallery and Together Mode are available in Teams for the latest versions of Google Chrome and Chromium-based Microsoft Edge.
Link: Microsoft Teams: 49-person grid is coming to Chrome and Edge, as breakout rooms arrive
via http://www.zdnet.com