IDK Floorp, and I have limited experience w/Zen.
I have tested and used every other one on your list.
They are all pretty good, considering the current state of the Internet.
My daily drivers are Librewolf and Vivaldi.
Bruce Schneier says Vivaldi is secure enough for him.
@VolumetricShitCompressor
I've been a paid subscriber since they were born.
They are very good, particularly the all-in-one. Lotta good stuff bundled into a subscription.
They are, however, drifting in the "TechBros" direction — or at least, their CEO is.
Still a great product today, and it may stay that way for decades. But, tentatively, I smell the waft of enshittification.
@Blaze