Here’s how to use Multiple Accounts Simultaneously In Firefox.
Firefox's Built-in Profile Manager
Firefox includes a powerful Profile Manager that lets you create and switch between different browser profiles. Each profile maintains its own bookmarks, history, passwords, and cookies, allowing you to stay logged into different accounts on the same websites.
To access the Profile Manager:
- 1.Close Firefox completely
- 2.Open your system's command line or terminal
- 3.Type
firefox -ProfileManager
and press Enter - 4.Create new profiles or select existing ones
- 5.Use the
-no-remote
command line switch to run multiple profiles simultaneously
Multi-Account Containers Extension
For an easier solution that doesn't require command line knowledge, Firefox's official Multi-Account Containers extension is your best bet. This add-on lets you create color-coded containers that isolate website data, cookies, and sessions from each other.
Here's how to set it up:
- 1.Install the Multi-Account Containers extension from the Firefox Add-ons store
- 2.Click the containers icon in your toolbar
- 3.Create containers for different purposes (Work, Personal, Shopping, etc.)
- 4.Open new tabs and assign them to specific containers
- 5.Log into different accounts on the same website in different containers

Practical Use Cases
This approach works great for:
- Managing multiple email accounts (Gmail, Outlook, etc.)
- Accessing different social media profiles
- Separating work and personal browsing
- Testing websites with different user roles
- Sharing a computer while keeping accounts separate
Each container or profile maintains its own login sessions, so you can stay logged into Facebook with your personal account in one container and your work account in another without any conflicts.
Tips for Better Organization

- Give your containers or profiles descriptive names
- Use different colors for quick visual identification
- Set up container-specific bookmarks
- Consider using separate profiles for completely different browsing needs
- Remember that containers only isolate website data within the same Firefox instance
Whether you choose the built-in Profile Manager or the more user-friendly Multi-Account Containers extension, Firefox gives you the flexibility to manage multiple online identities without constantly logging in and out.