Dualless is a featured Chrome extension by Ben Lau. It has 1,000,000+ weekly active users and an average rating of 4.10. Dualless is similar to Split Screen for Google Chrome and fluany. The latest version is 0.4 and was updated 2 years ago. Dualless is only available in English (UK). Within Chrome Web Store, its overall ranking is #245.
Dualless is a poor man's dual monitor solution. It splits your browser windows into two by just 2 clicks. The ratio can be adjusted according to your needs.You may have a browser window showing on the right that occupy 30% of your screen. Then the rest of space leave to Google+.
The extension simulates the environment of dual monitor. Utilize the space for 16:9 monitor
It is a way to quickly adjust the size of two windows. It does not simulate two monitors as it claims. If it did, when I tried to maximize a window it would again put it in the pre-set layout. If I said to maximize a window, it would maximize it within the area/section it was in not back to your full monitor. Lastly, and something I didn't expect from it, you would be able to select a section/monitor to share during zoom or other screen shares. It does none of that. I'm sure it's fine for a different use case, but it doesn't do what it is advertised to do.