MetaDock lets you create a grid layout of different browsers, native apps and/or games. These layouts are auto-saved, and restore seamlessly. You can have as many layouts as you want.

A collection of layouts is called a workspace, and restores to the same size/position across multiple monitors. You can switch between, export/import workspaces and much more.

NOTE: Apps and games must be running first to mount into MetaDock.

It also has its own browser engine, which allows it to create and control its own browser windows with some advanced functionality - such as the ability to sign in to the same website multiple times via multiple profiles.

A load of other features

Available right now for $1 for a limited time

https://www.metadock.net (goes to the steam page)

P.s. my video is old footage, it looks better and has more features than the featured video.