In Chrome's excellent developer tools.
Does anyone know for what reasons they're banned edit cookies, and whether to do it?
About Edit This Cookie
know, but it's a pretty curve and raw. The rest is even worse.Here
's a suggestion on the Google forum on the subject.
Or, maybe there are some plugins that allow you to edit your cookies right in the Developer Tools? It is convenient also. As, for example, firebug+firecookie.