A profile in Firefox is the collection of settings, customizations, add-ons, and other personalizations that a user has made or installed into their copy of Firefox. You can find on Mozilla's end-user support site. Reasons to have multiple profiles The casual user may want to have different profiles for different family members.

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Having different profiles would allow each person to have his or her own set of bookmarks, settings, and add-ons. Web developers might want a secondary profile for testing websites, apps, or other projects on different Firefox channels. For example, you might want to have some extensions installed for Web development, but not for general-purpose Web browsing. While using the Nightly channel, you may encounter some add-ons that have become temporarily incompatible with new API changes, until the add-on developer has a chance to update them. You can remove such add-ons from your profile for Nightly use while keeping them for use with other profiles. For QA, testing, and bug triaging contributors, you may want to have multiple development versions of Firefox installed, each with its own profile. Creating new profiles for testing can keep you from losing your preferences, bookmarks, and history.

It takes little time to set up a new profile, and once it is complete, all of your Firefox versions will update separately and can be run simultaneously. Available browser development channels There are four available browser channels, each at a different level of stability and development. The four channels are,. The Release channel is recommended for most users, as it is the 'official release' channel. However, for those more adventurous, you can try one of the other three channels to see what is coming in Firefox and play around with emerging features. The Beta channel contains the features that are expected to be in the next release of Firefox and are in final stages of testing. Aurora contains experimental features, which are not yet at beta quality.

Nightly contains the latest code from Firefox developers and is the least stable channel. Third-party tools In addition to the built-in Profile Manager and the external Profile Manager, there are a few third-party tools that make working with multiple profiles easy. This list is by no means exhaustive.

Please add any helpful tools you discover to the list! Mac OS X. by Dave Martorana Profile management Determining the profile while Firefox is running To determine the profile of a currently-running Firefox instance in Windows, macOS or Linux,. Type about:profiles into the browser URL search bar.

The page presents a list of all of your profiles, each beginning with 'Profile: ' followed by its name. The one being run by this Firefox instance will include the bold text ' This is the profile in use' For example, if you find that text beneath the entry for 'Profile: Suzie', then you are running in a profile named Suzie. Launching Firefox into a Desired Profile You cannot change the profile while Firefox is running.

Although it is possible in some cases to have multiple instances of Firefox running in different profiles, to avoid confusion, you should first exit/quit/terminate all running instances of Firefox, FirefoxDeveloperEdition or Nightly. Then follow the instructions below, applicable to your operating system.

Windows Windows XP. Click the Start button. Click 'Run'.

Type firefox -ProfileManager. Windows Vista/7. Click the Start button.

Click the search bar at the bottom. Type firefox -ProfileManager. Windows 8/8.1. Press 'Windows + R' on your keyboard. Type firefox -ProfileManager. If the Profile Manager window does not open, Firefox may have been running in the background, even though it was not visible. Close all instances of Firefox, or restart the computer, and then try again.

Linux If Firefox is already included in your Linux distribution, or if you have installed Firefox with the package manager of your Linux distribution:. At the top of the Firefox window, click on the File menu and select Quit. In Terminal run firefox -ProfileManager If the Profile Manager window does not open, Firefox may have been running in the background, even though it was not visible. Close all instances of Firefox, or restart the computer and then try again.

MacOS. Run the Terminal application, which is found in Applications/Utilities. Type or paste in the path to Firefox, followed by.app/Contents/MacOS/firefox. For example, if Firefox is installed in the recommended location, you would enter /Applications/Firefox.app/Contents/MacOS/firefox. If you have the path to your desired profile handy, enter a space character, followed by -profile followed by another space character, followed by the full path to the profile folder you wish to launch into.

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This will launch Firefox immediately. Otherwise, enter a space character followed by -profilemanager.

This will present the Profile Manager window in which you can make your selection. Hit return. Here is a complete example Terminal command from steps 2-3: /Applications/Firefox.app/Contents/macOS/firefox -profile /Users/Suzie/Library/Application Support/Firefox/Profiles/r99d1z7c.default If you want to do this frequently and more easily, you may wish to create an Automator application, as explained in. Creating a profile Creating a profile through the Profile Manager These instructions should be the same for all operating systems. To start the Create Profile Wizard, click 'Create Profile.' In the Profile Manager. Click Next and enter the name of the profile.

Use a profile name that is descriptive, such as your personal name. This name is not exposed to the Internet. You can also choose where to store the profile on your computer. To select storage location, click Choose Folder.

If you choose your folder location for the profile, select a new or empty folder. If you choose a folder that isn't empty, and you later remove the profile and choose the 'Delete Files ' option, everything inside that folder will be deleted. To create the new profile, click Finish. Creating a profile through the Firefox browser You can create a new Firefox profile directly from the browser. Type about:profiles into the browser URL search bar. On the page, click Create a New Profile button. Read the introduction, and click Next.

Enter a profile name for your new Profile. Use a profile name that is descriptive, such as your personal name. This name is not exposed to the Internet. Optionally, to change where the profile will be stored on your computer, click Choose Folder.

To create the new profile, click Finish. Deleting a profile. In the Profile Manager, select the profile to remove, and click Delete Profile. Confirm that you wish to delete the profile:. Don't Delete Files removes the profile from the Profile Manager yet retains the profile data files on your computer in the storage folder so that your information is not lost.

'Don't Delete Files' is the preferred option, because it saves the old profile's folder, allowing you to recover the files to a new profile. Delete Files removes the profile and its files, including the profile bookmarks, settings, passwords, etc. Note: To access other profiles after selecting this option, you must start the Profile Manager first.

Using the profiles Windows If you want to have the profile manager to pop up each time you start Firefox, so you can choose a profile, you will need to edit the 'Target' of the launch icon. To do this:. Right-click the icon and choose 'Properties'.

When the properties dialog box pops up, you should see a 'Target' text field that you can edit, and it should show the current file path. After the closing quote, add -ProfileManager. Now whenever you double click that icon, the profile manager should appear, allowing you to choose which profile you'd like to use. If you want individual icons to launch specific profiles, you will need to edit the 'Target' of each icon. To do this:. Right-click the icon and choose 'Properties'.

When the properties dialog box pops up, you should see a 'Target' text field that you can edit, and it should show the current file path. To permanently set a specific profile, add -p PROFILENAME to the target path, but outside of the quotes, replacing 'PROFILENAME' with the actual profile name you chose. If you would also like to allow multiple instances of Firefox to run at the same time, add -no-remote after the profile name.

Once you are all done, click Ok. Do this for each icon you'd like to have a specific profile for. Once done, each one should automatically start with the specified profile. Linux There is no extremely straightforward way to create custom application launchers in Gnome 3 like there was in Gnome 2.

The following tutorial will help get you going overall:. Once you get to the point of adding a new item, you can have the profile dialog show up every time or set the launcher to launch a specific profile. If you want to have the profile manager to pop up each time you start Firefox, so you can choose a profile, you will need to set the command line for your new launcher. Set the 'command' text field to target the executable file, likely '/usr/bin/firefox', and add the -p parameter. If you want individual icons to launch specific profiles, you will need to set the command line for your new launcher. To do this:.

Set the 'command' text field to target the executable file, likely '/usr/bin/firefox', and add the -p PROFILENAME parameter, replacing 'PROFILENAME' with the specific profile. Repeat as necessary, for each additional profile you want to set. If you would also like to allow multiple instances of Firefox to run at the same time, add '-no-remote' after the profile name.

Mac OS X You can find a useful tutorial to set up custom launchers here:. Do note it's best to follow all steps in the 'Creating the scripts' section, including the 'edit Info.plist' step. Leave off the profile name if you want the profile selector to show up every time you launch. Setting up multiple profiles for different Firefox channels This section will be especially helpful if you are a developer, wanting to work with multiple channels, and each having their separate launcher. Windows In Windows, the Developer and Nightly builds get their own directory in the 'Programs' folder, so you don't have to worry about where to store the downloaded files. However, all three will attempt to use the same profile by default. You won't want to keep this behavior, because the different channels have different levels of features.

To set each launcher, follow the Windows instructions at. Linux In Linux, things aren't as automatically set up. You will likely get a prompt to download a tar.bz2 file to extract from. Extract the files to a new directory, and use the new launcher instructions from. The only change you will need to make is the command path. You will want to set it to the directory where you extracted the Firefox channel's tar.bz2 file, and the executable 'firefox' file located within this directory. The remaining profile assignment methods will remain the same.

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You will want to, for sure, add the -no-remote part to the end of the command field, so that you could run multiple instances at the same time. Mac OS X You can find a useful tutorial to set up custom launchers here:. Do note it's best to follow all steps in the 'Creating the scripts' section, including the 'edit Info.plist' step. Also, you'll want to change the path in the do shell script to point to the correct.app file for the Firefox channel you want to target.

In iOS 4 and later and Mac OS X 10.8 and later, you can remove a configuration profile that is outdated, interferes with other profiles, or relates to a service you no longer use. However, be aware that removing a profile will remove all settings associated with it. If the profile was used to configure your email or IU Secure, removing it will remove those settings, and you will no longer have access to those services. To remove a configuration profile in iOS:. On your iOS device, open Settings  General.

Scroll to the bottom and open Profiles. If you do not see a 'Profiles' section, you do not have a configuration profile installed. In the 'Profiles' section, select the profile you wish to remove and tap Delete Profile. If you have a passcode for your device, you will be prompted to enter it. Then tap Delete. To remove a configuration profile in Mac OS X:.

From the Apple menu, select System Preferences. From the View menu in System Preferences, select Profiles.