Let’s face it, Google (GOOG) offers up a variety of different services that are reliable, provide value and are usually free. Many users have more then one Google account and if you just happen to be one of these people, you may have been faced with the situation where you had to log out of one account to log into another.
To avoid this issue, some users turned to third party plugins like Firefox plugins or Greasemonkey scripts, but it looks like these may soon become relics as Google is rolling out a new feature that will allow users to sign into multiple Google accounts simultaneously. Once you’re logged into your personal account, look for the multiple sign-in option that is located under the personal settings that are found on the account management page. From here, you can toogle the feature off or on. The feature is still being rolled out, so it is possible that some may not see it at this time, but it is coming.
Once enabled, you will be offered a drop down menu of choices amongst email addresses between which you can select.