@VitoBotta
The Shiira browser was also cool at one point. So was the Camino browser. These are dead projects now, sadly. There was a few more that I think are still updated, Maxthon and a special gesture-based browser that felt like it was programmed in the same spirit that Shiira was - perhaps it's just because it was developed in Japan or by Japanese.
There are too many animations in this modern and current version of Opera or perhaps the interface is just quirky and that is what it feel as a non-so-good-browser for me.
I will admit to have used Opera in recent years and also back when Opera was cool. I have however not tried Opera in 2021. When they rename the browser to Techno I might use it.
Of course, now after gearing up I ought to just download and install Opera.
Vivaldi seems to have become too weird and bloated too. It went so well in the beginning.
I stopped using Vivaldi, because I could not stop tweaking the browser interface - which is a really good feature of Vivaldi.
IMO, there's only 3 or 4 good choices for macOS.
Firefox(which still has trouble integrating with macOS properly after all these years - especially when using the download dialog window)
Google Chrome & Microsoft Edge and then in last place we have Safari.
I usually start on out using Safari on a fresh macOS Big Sur installation, then realizing that all the content blocker/Ad blockers are awful, I then quickly download Firefox and Google Chrome too.
Firefox gets a fair amount of usage and when all the little quirks Firefox still has gets on my nerves- then I use Google Chrome.
Firefox development is however moving really fast and more and more macOS-centric coding is being implemented. E.g Firefox 94 will utilize the newer macOS Low Power mode for fullscreen videos.
And recently, there's been a good amount of development on the contextual menus to match macOS' new design that came with Big Sur. It was a mess before.
Google Chrome and Google might get a lot of hate for their impact on the internet and how they manage their users data. Once you're past that, there's no beating Google Chrome.
Of course Brave Browser too.