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:
For one thing, you don't have to struggle with a shrunken top toolbar.
There's a good reason a significant and increasing number of browsers (including Floorp, a Firefox fork) and other applications include view-splitting within them.
There's a reason Mozilla made Side View for Firefox.
https://addons.mozilla.org/en-US/firefox/addon/side-view/