A remote browser: does such a thing exist?

Totally agree with @shashank_watak . I’ve worked with VDI setups in enterprise environments, and another angle to consider is using virtual machines via Remote Desktop Protocol. You’re still interacting with a remote browser, but this time it’s part of a full virtual desktop. Services like Microsoft Azure Virtual Desktop or Amazon WorkSpaces let you spin up environments where your browser lives on a powerful server and just streams the visuals to you. It’s super helpful when you need browser performance without taxing your local hardware.