How to create a new profile in Mozile? How to transfer your profile in Firefox where Mozilla stores profile

Firefox saves your personal information, such as bookmarks, passwords and personal settings in a file set called a profile, which is stored separately from Firefox software files. You can have several profiles, each of which will contain your own set of data. With the help of the Profile Manager you can create, delete, rename profiles, as well as switch between them.

  • If you have (or you plan) several Firefox settings on one computer, read the Special Profiles article for each Firefox Installation.
  • If you solve the problem associated with Firefox: Firefox cleaning function can solve many problems by reset Firefox in the initial state. At the same time, the information you need will be saved. Try using this feature before starting a long troubleshooting process.

Starting Profile Manager

Profile management with Firefox Open

Enter about: Profiles In the Firefox address bar and click ENTERReturn.. As a result, the page opens About profiles.

The following parameters are available:

To manage profiles, find the profile you want to change and select the desired button under this profile:

  • Rename Click on this button to change the profile name in the Profiles Manager. Note: A folder that contains files for the profile is not renamed.
  • Install as default profile This option allows you to switch profiles. Click on this button so that Firefox uses this default profile at startup.
  • Run another browser with this profile If you click on this button, another Firefox window opens using this profile.

Running Profile Manager with Firefox Closed

Note: Another way to start the profile manager from the search field in the Windows Start menu. Close Firefox (if it is running), click, type firefox.exe -p. And press ENTER.

If the above instructions do not work or if you have several Firefox settings, use the following instructions.

Several Firefox Settings

You can install multiple Firefox programs in different places. To start the profile manager for a specific Firefox installation, replace firefox.exe in the above instructions for the full path to Firefox, enclose this line in quotes, and then add a space and -p.

Examples:
"Firefox (32-bit) on 64-bit Windows"
"C: \\ Program Files (x86) \\ Mozilla Firefox.\\ Firefox.exe "-p

"Firefox (32-bit) on 32-bit Windows" (or "64-bit Firefox on 64-Bit Windows")
"C: \\ Program Files \\ Mozilla Firefox \\ Firefox.exe" -p

The Firefox Profile Manager window must open (user profile selection).

Note: You may need to configure these instructions if Firefox is not installed on the default path (for example, if there are several settings).

If Firefox is already included in your Linux distribution or you installed Firefox using the package manager in your Linux distribution:

The startup parameter is written by the title letter P. In addition, you can use the -Profilemanager parameter, instead of the -p parameter.
The Firefox Profile Manager window must open (user profile selection).

If the profile manager window still has not appeared, then the Firefox is already running in the background, even if it is not visible. Close all running Firefox copies or restart your computer and try again.

Creating a profile

After starting the Profile Manager, as described above, you can create a new one, the additional profile as follows:

You will return to the Profile Manager window, in the list of which will be displayed new profile. When you first run Firefox with a new profile, you will be asked to enter your Firefox account so that you can (see below).

Delete profile

After starting the Profile Manager, as described above, you can delete an existing profile as follows:

Rename profile

After starting the Profile Manager, as described above, you can rename the profile as follows:

  1. In the Profile Manager, select a profile to rename and click the Rename button ....
  2. Enter a new name for the profile. Dial a new profile name and click OK.
    • Note: Folder containing profile files, it will not be renamed.

Parameters

These parameters are available only when you.

Work autonomane

Selecting this option loads the selected profile and starts Firefox without connecting to the Internet. You can view the previously visited web pages and experiment with your profile.

Use the selected profile without asking when starting

If you have several profiles, then this option specifies Firefox, what to do when you start:

  • If you put a tick of this parameter, Firefox will automatically download the selected profile at startup. To access other profiles, you must first start the Profile Manager.
  • If you take a tick of this parameter, Firefox will show you the profile manager every time you start Firefox so that you can choose a profile for use.

Use synchronization with a new profile

When you first open Firefox in a new profile, the "Welcome to Firefox" page opens with a place to enter your address email.

Enter your email address and click Continue to create or log in to Firefox Account. You can then configure "Synchronization" for a new profile so that you can share bookmarks, watching history, passwords and other user data with other Firefox profiles or devices.

  • If you already use synchronization in another profile or device, then enter the email address and password for your account Firefox so that your new profile can use these settings.
  • If you do not use synchronization, do not want to synchronize data with a new profile, or if you want to solve it later, you can Log in to your Firefox account and select "Do not synchronize this device" (See Disable Firefox synchronization) or Skip this step.

For getting for more information, read articles How can I configure sync on your computer? And how can I choose which types of information will be synchronized by Firefox? .

Move profile

Restore information from the old profile

If you have important information In the old Firefox profile, such as bookmarks, passwords or user settings, you can transfer this information to the new Firefox profile by copying the corresponding files. For more information, read the article Restore Important Data from the Old Profile. You can also switch to the previous profile to restore the old profile data. Read the article How to restore user data that disappeared after Firefox update for details.

// The following good people helped write this article:Unghost, Harry, Anticisco Freeman, Valery Ledovskoy, Swanmr.pound, Nikita Gutsenkov. You can also help -.

F Irefox has its own profile system that works as a chrome user account switch. Each profile has its own bookmarks, settings, extensions, browser history, cookies and other data. For example, you can create a profile for work and a separate profile for personal use.

Mozilla hides the Firefox profile manager without making it a noticeable part of the interface, as in Chrome, for example. But if you want to use different browser profiles with your settings and data, Firefox it allows.

Containers with multiple accounts in Firefox


Mozilla has another, more optimized solution if you just want parts of your browser to be separated from each other. The extension is called "Firefox Multi-Account Containers", and it is made by the Mozilla themselves. This extension allows you to choose a "container" for each open tab. For example, you can run tabs in the "Work" container when you work, and the "personal" container when you do not work. So, if you have a separate set of work accounts and personal accounts, you can simply switch between containers without logging and exit from each website.

Although it does not fully replace the need for profiles (bookmarks, browser history and extensions are separated between containers), it allows you to have a separate input status and cookies for each container.

How to create profiles and switch between them

Mozilla Firefox now allows you to manage profiles while working, without the need to use the Profile Manager available in older versions. To access this feature, enter " about: Profiles»In the Firefox address bar, and then press ENTER. You can add this page to bookmarks for more convenient access in the future if you want.

If you previously did not view Firefox profiles, you will probably use the default profile.

To create a new profile, click the "Create New Profile" button.


In the "Profile Creation Wizard" window that appears, specify the descriptive name for the new profile, so that you can remember what it is needed. For example, you can call it "working profile" if it is designed to work.


To start Firefox with a new profile, first click the "Install as default profile" button in the profile. As soon as he becomes your default profile, close all the open Firefox browser windows and restart Firefox. It will start with the selected default profile.

To return to another profile, go again to profiles: click "Set as default profile" for the profile you want to use, and then restart Firefox.

If you no longer need a profile, you can click the Delete button to delete it from your system. Keep in mind that this will delete all data stored in the profile, including its bookmarks, saved passwords and expansion.

How to use multiple profiles immediately

Perhaps you noticed that on the page "About profiles" there is a button "Run another browser with this profile". However, this button does nothing when using the default Firefox configuration for profile processing. By default, Firefox launches only one profile at the same time. You need to close and restart the browser to switch between profiles. But, by changing the shortcut that you use to start it, Firefox can simultaneously run multiple profiles.

To enable several Firefox profiles at once, you must run Firefox with the option -No-Remote.. To do this, you need to edit a shortcut in the taskbar, on the desktop or in the Start menu, which is usually used to start Firefox.

For example, if you use a shortcut on the taskbar to run Firefox, click right-click Mice on the Firefox icon on the taskbar, right-click on the "Mozilla Firefox" in the pop-up menu and select "Properties".


In the properties window on the "Label" tab, place the cursor at the end of the text in the "Object" field, and then add -No-Remote. At the end of the text. The field object should look something like this:

"C: \\ Program Files (x86) \\ Mozilla Firefox \\ Firefox.exe" -No-Remote


Close all the open Firefox browser windows, and then re-run Firefox using the shortcut you just changed. When you do it, you can return to the page about: Profiles And click the "Start another browser with this profile" button. Firefox will open a new browser window with a selected profile.

Using the old Profile Manager

You can also do everything we talked about, with the old Firefox Profile Manager, if you want. It also allows you to create special shortcuts that open Firefox Profile Manager and run Firefox with specific profiles if you want.

First, you need to completely close Firefox. Then you need to run Firefox with the key -p..

  • In Windows: Click Windows + R, enter Firefox.exe -p in the "Run" window that appears, and then press "ENTER".
  • On Mac: Open the Terminal window - click Command + Space, enter Terminal and press ENTER to do this from Spotlight. IN command line Enter /Applications/firefox.app/contents/macos/firefox-bin -profilemanager and press Enter.
  • In Linux: Open the terminal and run the Firefox -ProfileManager command.


You will see the user profile dialog box. By default, one user profile with the name "Default" will be created. You can use this window to create additional profiles, rename existing and delete them.

If you want to always see a profile selection when you start Firefox, which will allow you to choose a profile every time you click on the Firefox shortcut without using a special command - you can disable "run a selected profile without a request." It will make Firefox ask what profile you want to use until you enable this option.


To use Firefox, at least one profile is required. Each profile has its own own settings, extensions, bookmarks, history, cookies and everything else. Have this in mind. If you delete the default profile, you will lose all Firefox browser data (if you do not use Firefox Sync).

When you create a new profile, you can give him any name you want. The wizard will show you where the profile will be stored. By default, they are placed in the Firefox profile folder of your user account with the prefix of eight random letters and numbers.


Select a profile and click "Run Firefox" to start Firefox with the selected profile. When you first launch Firefox with a new profile, you will see a greeting.

Close Firefox and start it again to switch between profiles. If you have disabled the "Run Selected Profile without a query" option, then Firefox will ask which profile you want to use before starting. You can also leave this check box and run Firefox using the switch. -p. or -Profilemanager To access the hidden Profile Manager, when you want.

For convenience, you can create a shortcut that will also open Firefox using the Profile Manager. For example, in Windows, you can create a copy of the Mozilla Firefox shortcut on the desktop, rename it as "Mozilla Firefox - Profile Manager", and then add a space and -p. At the end of the text in the "Object". This shortcut will now open Firefox using the Profile Manager, assuming that Firefox is completely closed when the label is started.

By default, Firefox does not work as chrome. He wants you to use one profile at the same time. However, if you want, you can use several profiles at once.

To do this, you just need to run Firefox using the key -No-Remote.. You can do this in the "Run" dialog box or in the terminal or simply change the existing Firefox label. For example, if you have created a pavement manager shortcut, you can just add -No-Remote.so that it happens -P -No-Remote At the end of the field the object.

Run Firefox using this switch, in other words, double click on the shortcut you just created, and it will not check whether Firefox works already. Instead, he will ask which profile you want to use, and create a new Firefox process with this profile.

You can use this process to open Firefox with any number of different profiles, although each profile can be used only by one copy of Firefox at a time. If you try to open the same profile for the second time it is already running, you will see a mistake that the profile is already used.

Note. If you see a profile utilization error, while Firefox is closed, you may need to visit the task manager and kill the Firefox.exe process from there, forcibly close it if it works in the background.

Everything should work as you expected. However, while Chrome really simplifies viewing the profile that you use, in your interface, Firefox does not make this information very noticeable. To do this, you can install another topic for each profile to visually distinguish them.

If you ever need to find out what profile you use, you can find this information on the page. about: Profiles».

You do not need to use the Profile Manager to troubleshoot problems with your Firefox profile. Instead, you can use the "Reset Firefox" function to get browser Firefox. With source settings, without losing important things.

Firefox Saves Your Personal Information Such As Bookmarks, Passwords, and User Preferences in A Set of Files Called Your, Which is Stored In a Separate Location from The Firefox Program Files. You can Have MultiPle Firefox Profiles, Each Containing A Separate Set Of User Information. The Profile Manager Allows You to Create, Remove, Rename, and Switch Profiles.

  • If You Have (or Plan to Have) Multiple Installations of Firefox on One Computer, See Dedicated Profiles Per Firefox Installation.
  • If You are Troubleshooting A Problem with Firefox: The Refresh Firefox Feature Can Fix Many Issues by Restoring Firefox to Its Default State WHILE SAVING Your Essential Information. Consider using it Before Going Through A Lengthy Troubleshooting Process.

Table Of Contents.

Starting the Profile Manager

MANAGE PROFILES WHEN FIREFOX IS OPEN

Type about: Profiles INTO THE ADDRESS BAR AND PRESS THE ENTERReturn. Key. This Will Open The About profiles Page.

The Following Options Are Available:

To Manage Profiles, Find The Profile You Want To Change and Choose From These Buttons Underneath That Profile:

  • Rename Click This To Change The Name Of A Profile in the Profile Manager. Note: The Folder Containing The Files for the Profile Is Not Renamed.
  • Set As Default Profile This Option Allows You to Switch Profiles. Click This To Make Firefox Use This Profile by Default At Startup.
  • Launch Profile in New Browser When You Click This, Another Firefox Window Will Open Using That Profile.

Start The Profile Manager WHEN Firefox Is Closed

Note: Another Way to Start The Profile Manager Is From The Search Box in the Windows Start Menu. Close Firefox (If Open), Press, Type firefox.exe -p. and Press Enter.

If The Above Instructions Do Not Work Or If You Have Multiple Installations of Firefox, use the Fallowing Instructions Instead.

MultiPle Firefox Installations.

You can Have MultiPle Firefox Programs Installed in Different Locations. To Start The Profile Manager for a Specific Firefox Installation, Replace Firefox.exe in The Above Instructions Program, Enclose That Line In Quotes, Then Add a Space Followed by -p.

Examples:
Firefox (32-bit) on 64-bit Windows
"C: \\ Program Files (x86) \\ Mozilla Firefox \\ Firefox.exe" -p

Removing a Profile

After Starting The Profile Manager AS Explained Above, You Can Remove An Existing Profile As Followows:

Renaming a Profile

After Starting The Profile Manager AS Explained Above, You Can Rename A Profile As Followows:

  1. In The Profile Manager, SELECT THE PROFILE TO RENAME, AND THEN CLICK RENAME PROFILE ....
  2. ENTER THE NEW NAME FOR THE PROFILE. Type In The New Profile Name, and Click on Ok.
    • Note.: The Folder Containing The Files for the ProFile Is Not Renamed.

Options.

Work Offline

Choosing This Option Loads The Selected Profile and Starts Firefox WITHOT Connecting To the Internet. You can View Previously Viewed Web Pages and Experiment with Your Profile.

Use The Selected Profile Without Asking At Startup

When You Have MultiPle Profiles, This option Tells Firefox What to do at startup: WHAT TO DO AT STARTUP:

  • If You Check This Option, Firefox Will Automatically Load The Selected Profile At Startup. To Access Other Profiles, You Must Start The Profile Manager First.
  • If You Uncheck This Option, Firefox Will Show You The Profile Manager Each Time You Start Firefox, So That You Can Select a Profile to Use.

Use Sync With A New Profile

WHEN YOU FIRST OPEN FIREFOX IN A NEW PROFILE, A Welcome to Firefox. Page Will Open, with a space to enter your email address.

Firefox saves your personal information, such as bookmarks, passwords and personal settings in a file set called a profile, which is stored separately from Firefox software files. You can have several profiles, each of which will contain your own set of data. With the help of the Profile Manager you can create, delete, rename profiles, as well as switch between them.

  • If you have (or you plan) several Firefox settings on one computer, read the Special Profiles article for each Firefox Installation.
  • If you solve the problem associated with Firefox: Firefox cleaning function can solve many problems by reset Firefox to its original state. At the same time, the information you need will be saved. Try using this feature before starting a long troubleshooting process.

Starting Profile Manager

Profile management with Firefox Open

Enter about: Profiles In the Firefox address bar and click ENTERReturn.. As a result, the page opens About profiles.

The following parameters are available:

To manage profiles, find the profile you want to change and select the desired button under this profile:

  • Rename Click on this button to change the profile name in the Profiles Manager. Note: A folder that contains files for the profile is not renamed.
  • Install as default profile This option allows you to switch profiles. Click on this button so that Firefox uses this default profile at startup.
  • Run another browser with this profile If you click on this button, another Firefox window opens using this profile.

Running Profile Manager with Firefox Closed

Note: Another way to start the profile manager from the search field in the Windows Start menu. Close Firefox (if it is running), click, type firefox.exe -p. And press ENTER.

If the above instructions do not work or if you have several Firefox settings, use the following instructions.

Several Firefox Settings

You can install multiple Firefox programs in different places. To start the profile manager for a specific Firefox installation, replace firefox.exe in the above instructions for the full path to Firefox, enclose this line in quotes, and then add a space and -p.

Examples:
"Firefox (32-bit) on 64-bit Windows"
"C: \\ Program Files (x86) \\ Mozilla Firefox \\ Firefox.exe" -p

"Firefox (32-bit) on 32-bit Windows" (or "64-bit Firefox on 64-Bit Windows")
"C: \\ Program Files \\ Mozilla Firefox \\ Firefox.exe" -p

The Firefox Profile Manager window must open (user profile selection).

Note: You may need to configure these instructions if Firefox is not installed on the default path (for example, if there are several settings).

If Firefox is already included in your Linux distribution or you installed Firefox using the package manager in your Linux distribution:

The startup parameter is written by the title letter P. In addition, you can use the -Profilemanager parameter, instead of the -p parameter.
The Firefox Profile Manager window must open (user profile selection).

If the profile manager window still has not appeared, then the Firefox is already running in the background, even if it is not visible. Close all running Firefox copies or restart your computer and try again.

Creating a profile

After starting the Profile Manager, as described above, you can create a new one, the additional profile as follows:

You will return to the Profile Manager window, the list of which will display a new profile. When you first run Firefox with a new profile, you will be asked to enter your Firefox account so that you can (see below).

Delete profile

After starting the Profile Manager, as described above, you can delete an existing profile as follows:

Rename profile

After starting the Profile Manager, as described above, you can rename the profile as follows:

  1. In the Profile Manager, select a profile to rename and click the Rename button ....
  2. Enter a new name for the profile. Dial a new profile name and click OK.
    • Note: Folder containing profile files, it will not be renamed.

Parameters

These parameters are available only when you.

Work autonomane

Selecting this option loads the selected profile and starts Firefox without connecting to the Internet. You can view the previously visited web pages and experiment with your profile.

Use the selected profile without asking when starting

If you have several profiles, then this option specifies Firefox, what to do when you start:

  • If you put a tick of this parameter, Firefox will automatically download the selected profile at startup. To access other profiles, you must first start the Profile Manager.
  • If you take a tick of this parameter, Firefox will show you the profile manager every time you start Firefox so that you can choose a profile for use.

Use synchronization with a new profile

When you first open Firefox in a new profile, the "Welcome to Firefox" page opens with the place to enter your email address.

Enter your email address and click Continue to create or log in to Firefox Account. You can then configure "Synchronization" for a new profile so that you can share bookmarks, watching history, passwords and other user data with other Firefox profiles or devices.

  • If you already use synchronization in another profile or device, then enter the email address and password for your Firefox account so that your new profile can use these settings.
  • If you do not use synchronization, do not want to synchronize data with a new profile, or if you want to solve it later, you can Log in to your Firefox account and select "Do not synchronize this device" (See Disable Firefox synchronization) or Skip this step.

For more information, read articles How can I configure sync on your computer? And how can I choose which types of information will be synchronized by Firefox? .

Move profile

Restore information from the old profile

If you have important information in the old Firefox profile, such as bookmarks, passwords or user settings, you can transfer this information to a new Firefox profile by copying the corresponding files. For more information, read the article Restore Important Data from the Old Profile. You can also switch to the previous profile to restore the old profile data. Read the article How to restore user data that disappeared after Firefox update for details.

// The following good people helped write this article:Unghost, Harry, Anticisco Freeman, Valery Ledovskoy, Swanmr.pound, Nikita Gutsenkov. You can also help -.

What is a profile?

Firefox saves all the information that the user generates when working with a browser, in a special folder called profile. Save data such as bookmarks, cookies, travel log history, browser settings and installed add-ons stored passwords. When you first start Firefox, the profile is created with default settings.

Location Profile folder

Depending on the operating system The default profile folder is on the following paths.
If you have created this folder on your own through the profile manager and indicated different from the proposed path, the profile folder can be in a different place.

Windows 95, 98 and Me

C: \\ Windows \\ Application Data \\ Mozilla \\ Firefox \\ PROFILES \\ \\ C: \\ Windows \\ PROFILES \\ \\ Application Data \\ Mozilla \\ Firefox \\ PROFILES \\

Windows 2000, XP

    Select "Start → Run";

    Enter% appdata%;

    Click OK. Windows Explorer window appears;

    IN windows window Explorer Select "Mozilla → Firefox → PROFILES". Each subfolder in this folder is a profile on your computer.

C: \\ Documents and Settings \\ \\ Application Data \\ Mozilla \\ Firefox \\ PROFILES \\

The "Application Data" folder is a hidden folder. To display hidden folders Open Windows Explorer and select: "Tools → Folder Settings → Tab View → Show hidden files and folders."

Windows Vista and Windows 7

    Click the Start button to open the menu;

    Enter% APPDATA% in the Start Search field;

    Click "Roaming" appeared in the menu;

    In the Windows Explorer window that opens, select "Mozilla → Firefox → PROFILES". Each subfolder in this folder is a profile on your computer.

You can also directly go to this folder using the following path:

C: \\ Users \\ \\ AppData \\ Roaming \\ Mozilla \\ Firefox \\ PROFILES \\

The "APPDATA" folder is a hidden folder. To display hidden folders, open Windows Explorer and select: "Sort → Folder Properties and Search → Folder Settings → View tab → Show hidden files and folders."

* Nix

Profile folders are located in:

~ / .mozilla / Firefox /

The ".mozilla" folder is hidden.

Mac OS X.

Profile folders are located in one of the following folders:

~ / Library / Mozilla / Firefox / PROFILES / / ~ / Library / Application Support / Firefox / Profiles /

The tilde symbol (~) refers to the home directory of the current user. Thus, ~ / library is a folder / Macintosh HD / Users / / Library. (In the Russian version, the path to this folder may look like / Macintosh HD / users /<имя пользователя>/ Library)

Search Profile folder

You can use the Open Profile Folder extension that will open the folder of your profile if you use the appropriate menu item in the "Tools" section.

Creating a profile

Files and folders in profile

It is not recommended to edit these files directly. Instead, use the user interface. The exceptions are three files whose name begins to "User". They are intended to edit the user directly. For more information about files, refer to the table below.

Folders

Folder Firefox version Description
bookmarkBackups.1.5 and above5 recent copies of the bookmark file. Updated daily.
Cache.Below 1.5Cache files loaded from the Internet. Note: In Firefox 1.5 and above only profiles? Created in non-standard locations in Windows includes a Cache folder. For information about the location of the cache, use the ABOUT: Cache command.
OfflineCache.3.0 and aboveSecond disk cache For autonomous file storage. Note: Only profiles created in non-standard locations in Windows include the OfflineCache folder. For information about the location of the cache, use the ABOUT: Cache command.
chrome. To store files Userchrome.css and UserContent.css
extensions Installed add-ons.
microsummary-Generators.2.0 and higherGenerated microvods.
minidumps. For error message tool.
preferences. Contains the existing profile-defaults.js file.
searchPlugins.1.5 and aboveSearch plug-ins installed by the user.

Files

Name Firefox version Description
.Autoreg Temporary empty filesignaling changes in installed extensions
.ParentLock (Mac OS X) See parent.lock
blocklist.xml2.0 and higherAutomatically downloaded list of dangerous extensions
bookmarks.bak.Below 3.0Backup file bookmarks Bookmarks.html
bookmarks.html.Below 3.0Bookmarks (Bookmark → Manage bookmarks)
bookmarks.html.moztmpBelow 3.0Temporary bookmark file. If you find it, remove the read-only attribute from it, as it leads to the creation of a multitude of bookmark files with names of the view Bookmarks-N.HTML (BUG 157152)
bookmarks.postplaces.html.3.0 (Proreliza)Backup Bookmark files in 3.0 Beta 4 and below and at night assemblies 3.0 until March 14, 2008. Not used in later builds 3.0
bookmarks- (date) .html in the BookmarkBackups folderBelow 3.0
bookmarks- (date) .json in the BookmarkBackups folder3.0 and aboveDaily copy created file bookmarks
cERT8.DB. Security Certificates (Menu Tools → Settings → Advanced → Encryption → View certificates). If you have certificate problems, delete this files. See also Key3.db and Secmod.db
cERT_OVERRIDE.TXT.3.0 and aboveStores exceptions for certificates specified by the user
compatibility.ini. Stores the version and the path to the last application, with which this profile was used. When loading a profile with an application with another version or path, the XPCOM component registration process starts. This file can be deleted manually - when booting the application, it will be created automatically.
components.ini.Below 1.5It lists extensions folders having XPCOM components. Replaced by the EXTENSIONS.INI file in 1.5
compreg.dat. List of registered XPCOM components. Automatically rehearsed when the XPCOM registration process is started
content-prefs.sqlite.3.0 and aboveIndividual page settings
cookies.sqlite3.0 and above
cookies.txtBelow 3.0It will keep all your saved cookies (Menu Tools → Settings → Privacy → Show Cookies). Deleting this file will delete all your cookies.
cookies.txt.moztmpBelow 3.0Temporary cookies file. If you find it or delete it, or remove the read-only attribute from it, as it leads to the creation of a set of files with the names of the view of Cookies-N.Txt (BUG 257288)
defaults.ini.Below 1.5It lists extensions folders containing files with default values. Replaced by the EXTENSIONS.INI file in 1.5
downloads.rdf.Below 3.0Download Manager Database. Contains a list of all injected files. Can be deleted to solve problems with slow download files or Firefox hangs (BUG 159107)
downloads.sqlite.3.0 and aboveDownload Manager Database. Contains a list of all injected files.
eXISTING-PROFILE-DEFAULTS.JS in the Preferences folder2.0.0.2 and aboveOverrows firefox Settings default. This file was used to prevent the default settings for existing profiles, when the default search plugin was changed with Yahoo! On Google in Firefox 2.0.0.2 in Japan, China, Korea and Taiwan. Can be removed to recover recent settings default
extensions.cache Cache installed extensions. It lists the installed extensions, their IDs and folders in which they are installed, as well as the date of them last change. It is used, for example, to register extensions installed by copying to a folder, which is one of the places to install extensions recognized by Firefox. This file is overwritten automatically and can be removed in case of problems with extensions.
extensions.ini1.5 and aboveList of folders with installed extensions and themes. The file is automatically generated using NsextensionManager and is used by low-level code to determine the chrome packages and the XPCOM component provided by the established vigorion. This file can be deleted in case of problems with extensions.
extensions.rdf. Information about the established extensions. This can be deleted in the event of the appearance of ghost extensions, as well as in the event of problems with extensions
extensions-Startup.manifestalpha 1.5Cache installed extensions. This file was used in Alpha Deer Park and later was renamed EXTENSIONS.CACHE
formhistory.dat.Below 3.0
formhistory.sqlite.3.0 and aboveContains the base of the stored data forms
history.dat.Below 3.0Visiting log: Contains a database of all visited web pages (menu of visits log menu). This file can be deleted in case of problems
hostPerm.1.Below 3.0Will keep a list of sites that are allowed or forbidden to install cookies and which are allowed to open pop-up windows
key3.db. Certificate Key Database (Tools → Settings → Advanced → Encryption → View certificates). If you have certificate problems, delete this file. When loading, it will be created again with default settings. Existing certificates will be removed and must be installed
kf.txt2.0 Key database for work protection mechanism from fraud (phishing)
localstore.rdf. Stores the location and size of windows and toolbars defined by the user. If you have any problems with windows, delete this file.
localstore-safe.rdf.1.5 and aboveSpecial version of LocalStore.RDF used in safe modeTo install window settings and default toolbars
lOCK (Linux) See parent.lock
mimetypes.rdf. Defines the actions produced when downloading certain types of files. Can be removed to reset the settings when downloading files to those that default
parent.Lock (Windows) Created when the Firefox is started with this profile and shows that the profile is used. Can be deleted to unlock profile
permissions.sqlite.3.0 and aboveDatabase with permissions to install cookies, opening pop-up windows, image loading and installing add-ons
persdict.dat. Personal dictionary of spelling verification dictionary
places.sqlite.3.0 and aboveBookmarks and visits log
places.sqlite-journal3.0 and aboveTemporary PLACES.sqlite file update storage if Firefox is open
pluginreg.dat.3.0 and aboveMIME type registration for installed plugins. Previously located in the Firefox folder containing profiles
prefs.js. All Firefox Settings (see About: Config)
search.rdf.Below 2.0.
search.sqlite.2.0 and higherInformation about your search plugins
secmod.db. Protection Device Database (Tools → Settings → Advanced → Encryption → Protection Devices)
sessionstore.js.2.0 and higherPreserved sessions
signons.txtBelow 1.5.0.10, below 2.0.0.2 for 2.x branchEncrypted strokes Passwords (Menu Tools → Settings → Protection → Show passwords). To work requires the key3.db file
signons2.txtAbove 1.5.0.10 for branch 1.5.x, above 2.0.0.2
signons3.txt3.0 and aboveEncrypted saved passwords (and exceptions for sites for which you have selected "Never save a password") (Menu Tools → Settings → Protection → Show passwords). To work requires the key3.db file
signons.sqlite.3.5 and aboveEncrypted saved passwords (and exceptions for sites for which you have selected "Never save a password") (Menu Tools → Settings → Protection → Show passwords). To work requires the key3.db file
uRLCLASSFIER.SQLITE or URLCLASSFIER2.SQLITE or URLCLASSFIER3.SQLITE2.0 and higherFishing file for phishing protection
uRLCLASSFIERKEY3.TXT.3.0 and aboveDatabase keys to protect against phishing
user.js (does not exist by default) The configuration file is defined by the user. The values \u200b\u200bfrom this files will be rewritten to the pref.js file when running Firefox. The main difference between the user.js file from pref.js is that Firefox cannot change the values \u200b\u200bset in user.js - this can only be done by the user
userchrome.css in the Chrome folder (does not exist by default) User-defined CSS rules intended to change the appearance of the application.
userContent.css in the Chrome folder (does not exist by default) User-defined CSS Rules, intended to change the appearance of web pages
userchrome.js in the Chrome folder (does not exist by default) User-defined javaScript codeintended to change the application
webappsstore.sqlite.2.0 and higherDOM repository
xpti.dat. List of registered XPCOM interfaces. Automatically generated again when starting the XPCOM registration process
XUL .MFASL (Linux) See xul .mfl
XUL .MFL (Windows)Below 1.5Cached user interface data. It can be deleted to resolve the problems. Note: In Firefox 1.5 and above, only profiles created in non-standard locations in Windows include the XUL .MFL file. For information about the location of the file, use the ABOUT command: Cache
Xul Fastload File (Mac OS X) See xul .mfl

Files and folders are out of profile

Name Firefox version Description
Crash Reports.3.0 and aboveFiles with messages about the fall of the program for Breakpad
Desktop Background.BMP (Windows)1.5 and aboveImage of the desktop background, installed Firefox. The file is created when you select "Set as a desktop background ..." in the context menu.
pluginreg.dat.Below 3.0Registration of MIME types for installed plugins. 3.0 pluginreg.dat is located in the profile folder.
profiles.ini. Contains information about the profile location. It can be edited to indicate a displaced profile. If this file is deleted, then upon the next time you start the program, it will be generated again along with the new default profile.
registry.dat. Contains information about the location of the profile in old versions of Firefox (no longer used).