Do you operate more than one Google account? Have you ever needed to use both at once and had to inconveniently sign in and out to switch back and forth between the two? Most annoying, isn’t it?
Previously the options have been to constantly sign in and out of different accounts like that, or use a second browser (which I found didn’t seem to work well between Firefox and Safari), or use Chrome Incognito.

Google has announced on The Official Gmail Blog that we can now enable a feature that allows us access to more than one Google account at at time, well mostly. After enabling the feature, you can sign into two other accounts from the sign in menu. However, Google is calling this an advanced feature for a number of reasons:
- Not all Google services support multiple account sign-in yet. These are the Google products that do: Google Code, Google Calendar, Gmail. Google Reader, Google Sites, Google Voice. Apparently, Google Docs will be added soon.
- The mobile versions of these products do not support multiple accounts in the same web browser. They will default to the first account you sign in to.
- Google products not included above will also default to the first account that you signed in with, using your current web browser session.
- Offline Mail and Offline Calendar will be disabled. You may lose any unsent mail.
These issues aside, I think it’s still a welcome addition and long overdue, especially if you have separate personal and work accounts. To enable the new feature, visit google.com/accounts and click the “Edit” link next to “Multiple sign–in”.

