Since March, Microsoft Edge based on Chromium supports vertical tabs, just click a button in the tab bar to turn it on: https://blogs.windows.com/windowsexperie

Since March, Microsoft Edge based on Chromium supports vertical tabs, just click a button in the tab bar to turn it on: https://blogs.windows.com/windowsexperience/2021/03/04/amp-up-your-performance-with-startup-boost-and-find-information-blazingly-fast-with-microsoft-edge-and-bing/ https://blogs.windows.com/windowsexperience/2021/03/04/amp-u... I believe back in the day that Opera was the first browser to commonly support the feature. And I remember using Firefox and Mozilla extensions for tab management a decade ago. The more things change...