Use RESET option in BROWSER TAB . this will clear cookies but cache will be still present. You can also make a profile and save it for further use. Let us know if this works for you.
There should not be any problems.
Load profile with gmail, than simply open new
tab and navigate to other site, Then just go back
to TAB where gmail is and confirm incoming mail.
I managed to do it by splitting the proxy and port in to there own variables and adding the : in the proxy mod [[PROXY]]:[[PORT]] which pulled the proxy and port back together, i`ll try what you've suggested too.