content: You don't turn vpn off and on... you have a second browser open and set it up to use a different way to get on internet. You merely switch between two browsers. One browser goes through the proxy setting in browser pref, one browser doesn't. The one that doesn't uses your normal internet connection. The one that does goes through the VPN to the proxy. Then you decide to make all your machine VPN except one browser, or vice versa. I assume there are minor tutorials on the net for this if you cant figure it out quickly.