I use a browser according to the operating system:

Windows: I use Edge. It's well-optimized for Windows, and I don’t know why more people don’t use it performs really well.

Linux: I use Firefox since it’s well-optimized for Linux.

iOS: Of course, I use Safari because it's the default and best optimized for Apple devices.

So, I think the choice of a browser is closely related to the operating system. For example, using Edge on Windows is great because it's optimized by Microsoft, but using it on iOS wouldn't feel the same.

From a developer’s perspective