You mean in the middle of an operation the browser drops the connection? If you experience this from multiple locations, it is surely the issue at the server side. May be there is some issue at the router level, like packet loss.
Is this Windows by chance? It can take awhile sometimes for account/domain creation on Windows, and Google Chrome and Safari browsers can drop connections/sessions at times, so if you are using one of these two browsers try FireFox or Opera.
All browsers will time out, including Firefox and Opera.
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