How to Access Another Facebook Account on My Computer
Facebook allows you to create a personal profile that helps you stay connected with coworkers, family and friends -- but that doesn't mean you're limited to having only one profile. Whether you have a separate account for a business or creative endeavor or one you use only to connect with people you know very well, it's possible to have several active Facebook accounts -- and access them simultaneously on the same computer.
Open a different Internet browser than the one you're using to access your primary Facebook account. For example, if you're using Google Chrome, open a Mozilla Firefox or Windows Internet Explorer Window. Opening a new window or tab within the same browser won't do -- the browser has your login information for Facebook stored.
Point your secondary browser to Facebook. Enter your login credentials for your secondary account, and click "Sign In" to access the account.
Use both of your Facebook accounts simultaneously. Pay particular attention not to post "News Feed" messages intended for friends on one account to another.