To complement: Since as early as October 2020 on testing [1] and as early as January 2021 on stable [2]. [1] https://techcommunity.microsoft.com/t5/articles/v

To complement: Since as early as October 2020 on testing [1] and as early as January 2021 on stable [2]. [1] https://techcommunity.microsoft.com/t5/articles/vertical-tabs-preview-now-available-in-the-canary-and-dev/m-p/1823751 https://techcommunity.microsoft.com/t5/articles/vertical-tab... [2] https://docs.microsoft.com/en-us/deployedge/microsoft-edge-relnote-archive-stable-channel#version-88070550-january-21 https://docs.microsoft.com/en-us/deployedge/microsoft-edge-r...