As an IT person at an MSP, this extension is invaluable. It allows me to logon to O365, Azure, and many other services for multiple customers without having to use private browsing/incognito mode or constantly logon and logoff to switch accounts. I have several tabs for each customer and it's super convenient. Along with the Container Tabs Sidebar extension, I have easily shaved 20 minutes off of the time I spent switching accounts every day.