How-To Geek

Sign Into Multiple Same-Service Accounts in Firefox

Do you need a way to sign into multiple accounts for the same online service in a single browser? If so then you might want to have a good look at the Multifox extension for Firefox.


We have three separate Gmail accounts open here…the only way to access them all at the same time is to use three separate browsers. Going through this on a daily basis could get frustrating very quickly.


How to Access More Accounts

Once you have installed the Multifox extension there are three ways to access it. Any of the three will cause a new and separate window to open.

The first is in the “File Menu”…


The second is in the “Tabs Context Menu”…


And the third is the “Context Menu” for your bookmarks.



As you open each window you will need to login with the appropriate credentials. You will also notice a “blue square with a number” at the end of the “Address Bar”. You can see here that the numbering starts at “2”…”1” is considered as the “originating window”.

Note: Do not combine the separate windows (tab dragging) into a single window or you will lose access to the multiple accounts. The separate windows help maintain the separate identities.


Clicking on any of the “blue numbered squares” will open a drop-down window like this with basic information about that particular “identity profile”.



If you have been wanting to try “same service multi-account” access for a single browser install then this might be just the extension for you.


Download the Multifox extension (Extension Homepage)

Akemi Iwaya is a devoted Mozilla Firefox user who enjoys working with multiple browsers and occasionally dabbling with Linux. She also loves reading fantasy and sci-fi stories as well as playing "old school" role-playing games. You can visit her on Twitter and .

  • Published 02/9/10

Comments (10)

  1. Adam

    What happens when you drag a tab out of an identity window? Does it keep the parent number, or does it go back to identity 1? Or does it make a new #?

  2. Asian Angel

    @Adam – New tabs or windows from a particular Identity Window remain connected/linked to the “parent Identity Window”.

  3. Me

    Or just run with -ProfileManager -no-remote arguments.

    “C:\Program Files\Mozilla Firefox\firefox.exe” -ProfileManager -no-remote

  4. Bala

    Thank you .. that’s a very useful addon BUT yahoo mail doesn’t work in it!!

  5. bassmadrigal


    But then you have to create multiple profiles, which means you would have to manage multiple sets of bookmarks, extensions, themes etc… I know because I have done this in the past.

    @Asian Angel, thanks. This looks to be an awesome extension to add to my arsenal.

  6. wyndham

    I agree with Bala above – it just does not work with BT Yahoo. I have 3 additional browsers and it initially shows the one you require but when you click on mail it keeps asking you to sign in over and over again. I deleted it.

  7. FavChrome

    This looks nice! Since Chrome integrated grease monkey into its system, would this work as a script for Chrome?

  8. Asian Angel

    @FavChrome – There is a user script that I have started looking at that just might do the same thing for Chrome. ^__^

  9. jrk

    Yahoo Mail bug is fixed in the dev version. it worked for me. :)

  10. bert

    Yahoo Mail is working on version 1.2. \o/

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