I don't think you need the extra layer of isolation. Browser tabs are isolated pretty well if they are running different sites. Chrome's spectre mitigations wil

I don't think you need the extra layer of isolation. Browser tabs are isolated pretty well if they are running different sites. Chrome's spectre mitigations will also help to isolate functions from one another https://security.googleblog.com/2018/07/mitigating-spectre-with-site-isolation.html https://security.googleblog.com/2018/07/mitigating-spectre-w...