I've found that I'm using this feature much more than I thought I would in arc. Before, I'd figure that it's the same as opening two windows side by side. It's not, having it as a built in feature opens up a lot of things. Opening an article on HN and the comments on HN side by side, for example. I NEVER did that before, now it's second nature.

I think this style of browsing really shows its strength for research and review type tasks. Maybe I'll research what it would take to write an extension to implement some of these ideas.

I was trying out Arc and almost forgot about it, but now knowing about this feature changes everything, thanks for pointing it out! Very often I need to see two or more pages side by side and I just hate making a mess in my browser with multiple windows open. They just tend to get lost and I have to move them out of the way or close them one by one, it is just annoying.

You can even have more than two splits, which I did not expect. Also, holding the option/alt key when clicking on a link opens it in a new split which is super convenient.

Vivaldi has this functionality as well, although the UI around it isn't great. There's no easy way to swap one pane with a different site - you have to untile the existing sites and retile the ones you want.

Zen browser does this as well though as a Firefox derivative, though as a quick disclaimer it is a relatively new project.

https://www.zen-browser.app/