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:
Not everybody has a compositor that allows you to un-maximize, minimize, restore, move and resize two windows adjacent to each other simultaneously.
Which one supports this on Windows and Linux?
PowerToys has FancyZones for Windows.
It's a valiant effort to allow functionality for window tiling, but like the name suggests it's for arranging things on a screen. It can't really facilitate two windows behalf as if they're one window split in two.
The truth is there is not a tool out there for every use case that gets posted here. You're going to have to weigh your options and pick what works closest to what you need. In my case, opening a new browser window will make my compositor mimic this behavior to an acceptable degree. Also in my case, it will not work on Windows. This is a trade off I am willing to make. It also might not be the best idea to want a feature bloated browser. How many people will use this over PowerTools/their preferred Linux compositor? Probably not many.