The most common reason to use multiple browsers is account isolation (to make tracking harder or to use multiple accounts, e.g. personal+work). At work I just u

The most common reason to use multiple browsers is account isolation (to make tracking harder or to use multiple accounts, e.g. personal+work). At work I just use Firefox as it has handy containers feature built-in. My home laptop is too old and slow to run Firefox comfortably so I use Chrome and Chromium (with different visual styles configured - for easier visual distinction) as 2 separate "containers". I probably am going to start using Vivaldi when I need one more.