I do just that... But I'm on Linux so I can use two (or three) instances of the same browser, from different user accounts. Linux makes it very easy to displa

I do just that... But I'm on Linux so I can use two (or three) instances of the same browser, from different user accounts. Linux makes it very easy to display apps from another user (which you authorize) on your graphical session. AFAICT this is just plain hell to do on OS X and on Windows (but blablabla X Window System is outdated, OS X rendering rocks, gnagnagna etc. Meanwhile I'm trivially surfing using different user accounts and this provides both conveniency and added security [any browser exploit now need also a local root exploit to be able to access sensitive data in the "real" user accounts]). My professional email is using a SSH tunnel / transparent Squid proxy : anyone doing a reverse shall find my company through the IP (on purpose). I'm launching Chrome from my "professional" user account using the proxy setting (from the command line). Then I've got another Chrome for my personal stuff. And a throwaway VM with yet another Chrome.