I want to give other browsers a try, especially Vivaldi with its many settings to fiddle. But Firefox's multi-account containers add-on is a godsend since I have to switch between multiple accounts for work.
I committed to switching to Vivaldi back in 2019 or so. I installed it on all of my machines (including Mac and PC). But I found it to be unstable and prone to crashes and weird issues, even though the features were nice. I eventually gave up in frustration and switched to Firefox, which I've found to be rock solid by comparison.
I personally am not planning to give Vivaldi another shot any time soon after that mess.
