Scenario: you set up a remote proxy (e.g. linode) and connect to it through ssh from your work pc. You set up Chrome/Firefox to browse the internet through it (via socks5) instead of using the workplace proxy.
Is any information leaked locally? In other words, what can the workplace IT administrator see from the internet traffic? I am particularly unsure about DNS lookup and flash videos.
With Firefox by default DNS lookup will be done locally and thus leaked. To change this you can type
in the location bar to access the advanced options. you need to set
network.proxy.socks_remote_dns = true
to resolve DNS queries on the remote server.