Google Multiple Sign-in, Now Available

Google is rolling out a feature I mentioned in a previous post: signing in to multiple Google accounts simultaneously from the same browser. When you go to the Google accounts page, you might see a new option: "multiple sign-in". If you don't see the new feature, it will probably be enabled soon.


After clicking on the "change" link, Google informs that this is an advanced feature and that it will only work for Gmail, Google Calendar, Google Sites, Google Reader, Google Voice, App Engine and Google Code. When multiple sign-in is enabled, a drop-down is displayed next to your email address at the top of the page, so you can quickly switch to a new account.

"If you use multiple sign-in, the first account you sign in to will be your default account. If you visit other Google products that don't support multiple accounts after you've signed in, you will automatically sign in to your default account for that product. If you sign out of any Google product while signed in to any account, you will be signed out of all your Google Accounts at once." (Google help center)


When you enable this feature, the most significant change is that you'll see a new drop-down next to your email address in Gmail and other supported Google products. Click on the drop-down and you can sign in to a new Google Account without signing out from the previous account.

Another change is that Google's URLs include a different number for each account: http://mail.google.com/mail/u/0/, http://mail.google.com/mail/u/1/, etc.


Google's help center explains that Google's services didn't allow you to sign it to multiple accounts at the same time using the same browser because Google uses sign-in cookies that only let you sign in with one account at a time. Obviously, you can use multiple browsers, Chrome's incognito mode, IE8's "new session" feature, multiple profiles, but the new Google feature makes things easier. Now you can read your messages from two or more Gmail accounts by opening Gmail in multiple tabs.

There are some known issues related to multiple sign-in: this feature is not available on mobile devices, Google Calendar's gadget doesn't work properly in Gmail, you can no longer use offline Gmail and offline Google Calendar and the "note in Reader" bookmarklet only works for the default account.

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Multiple Gmail Login Switcher

I’ve tried this little Gmail Login Switcher tool this morning and I must confess that it really made me happy. It allows you to instantly switch among all your Gmail accounts without having to log out from the account you’re logged in and then re-log in to the other account (very annoying if, for any reason, you have to check your email frequently).
Actually what this script does is replacing the “Sign Out” link located in the upper-right corner of the Google services with a drop-down menu. From that menu you can select one of your alternate Google accounts, and it will immediately logout and login to the other without any other user intervention.
Even if, once installed and configured, using the tool doesn’t require any particular ability, the installation process can put in little troubles the average internet user. Then, let’s show it in details.

Gmail Login Switcher Requirements

First of all, you must have all the following things in place:
Firefox. Sorry, the tool only works on Firefox. If you are still following the Explorer, listen to me …leave it alone, join the Fox crew and don’t look back: it’s free, smarter …and you won’t regret it!
The new version of Gmail. If you are still using the old version, you will have to switch to the new one. It’s easy: login to Gmail and click on the “Newer version” link on the upper-right corner of the page. Then logout and repeat this operation for each of your Gmail accounts.

Greasemonkey extension installed. This will probably sounds a little exotic for most of you. Don’t worry: Greasemonkey is a Firefox add-on that “allows you to customize the way a webpage displays using small bits of JavaScript” – just to use their own words. Well, install it and forget it! Go to the Greasemonkey homepage , click on the ‘install’ button, confirm that you want to install the add-on and restart Firefox.
At this point you will see a little monkey face on the status bar (lower-right corner of your Firefox window) If the monkey looks sad and grey , click once on the icon to activate.

Installing the Gmail Account Multi-Login script

Now that everything is in place, you can install and configure the script itself. Go to the script homepage and click on the black button on the right. Once again, Firefox will warn you, but go on. Done!

Configuring the Gmail Login etc.

Now that you have the script installed, login to one of your Gmail accounts and manually add all the Gmail accounts among which you want to be able to switch. To help you to do that, I’ve uploaded a short instructional video on YouTube. Hope this help…

Once finished with adding all your accounts to this Gmail login tool, you will be able to switch from an account to another simply selecting them from the drop menu.

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