I know Firefox has a Split View feature; however, it’s not as convenient as Vivaldi or the Arc browser. I love how The browser company implemented the Split View screen. Firefox Split View is pretty limited, and I’m unsure if it has improved since its release.
What does the community think about that?
Here is an example of Arc browser split view:
That makes sense. I’m using Floorp, which already has many CSS tweaks built-in; however, it is pretty limited, as you saw in the gif. With Arc, you can have as many Split/side Views. It’s one of their main selling features.
I would have a look into it (just out of curiosity, I'm happy with Firefox), but it's proprietary and not open source.