I have worked on some commercial projects that have a web front end to them. One thing to keep in mind is the test matrix. It can be daunting. You have a set of tests to perform across not only each browser type but also on different platforms because the same browsers on things like phones...
I only use Safari because I haven’t had any issues with it and I think because it is Apple’s they will do the best job with respect to power usage.
However I noticed that Vivaldi isn’t in the poll list. Seems interesting and comparable to Brave perhaps. https://www.techradar.com/reviews/vivaldi