I run the browser under different OS user accounts, and make my display manager display the user account in the window title bar.

https://megous.com/dl/tmp/8eaa15e187fa9a2e.png (ff1 being the user)

I trust it more than browser's internal isolation solutions, like tab containers, which I like to use for other things, like testing web apps using different login sessions at once.

I'd hate a remote solution. ;) Though this is not for privacy but more for protection and better low effort isolation.

Huh, I guess that, combined with a reasonable umask, would be a neat idea.

Does drag and drop work between windows owned by different users?

How would a browser proxy do anything aside from hiding from tracking, and maybe a tiny bit of protection from sites that use browser exploits(Not that it matters much since the only relevant ones are 0days that might not be in blocklists)?

It doesn't seem like it would do much against a device compromise.

Cloudflare (and others) are working on it: https://www.cloudflare.com/products/zero-trust/browser-isola...

Thaf looks industrial strength, i.e., not necessarily packaged for individual sale.

> I'm too busy to take this idea past the handwaving stage, but it seems like someone should have already done the homework.

Indeed. https://www.mightyapp.com/

I wonder if they could use firecracker or something to reboot the browser (and nuke persistent/ephemeral storage) on each page load. They could even bounce each user across all their hosts by default.

For trusted sites (ones the user logged into), this could be disabled.