You have many facebook accounts to serve your different needs, usually you use each facebook account at different time periods. When necessary, you must login multiple facebook accounts at the same time to use that the browser can only login a facebook account.

There are many ways you can log in to your facebook account at the same time, here are 3 ways to log in to multiple facebook accounts.
Method 1: Use multiple web browsers.
On a web browser, normal access will only be able to login to a facebook account at the same time.

So if you want to login to multiple facebook accounts at the same time, you can use different web browsers like Internet Explorer, Mozilla Firefox, Google Chrome, Coc Coc . to log in to different facebook accounts.
Method 2: Use the browser's privacy mode browser.
Privacy mode, also known as the incognito mode of the browser, you log in to your facebook account and open the browser privacy mode to log in to other facebook accounts.
Just with a browser, you can login to your multiple Facebook accounts when using the privacy mode.
With each web browser has a different way to open privacy mode, you can refer to how to open privacy mode with the browser you are using.
Internet Explorer
You select the Tools -> Safety -> InPrivate Browsing icon (or the key combination Ctrl + Shift + P ).
Firefox
There are many ways to open an incognito window, you can select the Open Menu icon (3 dashes) -> New Private Window ( Ctrl + Shift + P key combination ).
Google Chrome
Select the 3 dash icon of Customize and control Google Chrome and select New Incognito Window (or Ctrl + Shift + N ).
Cup Cup
You select the Coc Coc in the upper right and select New window .
Method 3: Create profiles in the browser.
You can create different profiles on the same browser. Each profile will allow you to log in to different accounts. And with each user account you can login a facebook account.
Want to open multiple facebook accounts with you can create many different profiles.
Internet Explorer
Press the Alt key on the keyboard, the menu bar appears on the browser. You choose File -> New Session .
Google Chrome
1. You select the Settings icon and choose Install .
2. In Settings, navigate to People and select Add Person .
3. Then you add new users and add accounts for new users. To switch different profiles, select the icon on the left and select the profile you want to use.
4. To create more profiles, just select the icon on the left and select New User .
With the above 3 ways, you can login many Facebook accounts at the same time to use. You can choose for yourself the fastest and most suitable way to use. Good luck!