Google Inc. is reportedly testing grounds for the multiple account Sign-Ins with the help of a single browser.

This post claims that it being restricted due to big limitations such as Gmail, Google Calendar, Google Reader, Google Docs, Google Sites and Google Code, but it was further stated that more services and support schemes shall soon be included in the future.

In regard of this service it was stated that if a service that does not go with multiple sign-in will become a default to the first account that you signed in using your browser.

Another restraint comes in from Gmail's offline mode which becomes disabled if one turns on multiple sign-in.

Experts claim that via using the multiple sign-in feature one can open Gmail in multiple tabs, log into various accounts and read messages from all accounts without having issues opening another browser.