Profiles - Where Firefox stores your bookmarks, passwords and other user data

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  • Revision id: 102166
  • Created:
  • Creator: philipp
  • Comment: unify windows steps (based on the right revision this time)
  • Reviewed: No
  • Ready for localization: No
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All of the changes you make in Firefox, like your home page, what toolbars you use, saved passwords and your bookmarks, are all stored in a special folder, called a profile. Your profile folder is stored in a separate place from the Firefox program so that, if something ever goes wrong with Firefox, your information will still be there. It also means you can uninstall Firefox without losing your settings and you don't have to reinstall Firefox to clear your information or troubleshoot a problem.

This information is here for reference. You don't have to follow these steps unless you were directed to do so from another article.

How do I find my profile?

  1. Click the menu button Fx57menu , click Help and select Troubleshooting Information.From the Help menu, choose Troubleshooting Information. The Troubleshooting Information tab will open.

    • Under the Application Basics section, click on Open FolderShow in FinderOpen Directory. A window will open that contains your profile folder.Your profile folder will open.
    Note: If you are unable to open or use Firefox, follow the instructions in Finding your profile without opening Firefox.

Finding your profile without opening Firefox

  1. Press the Windows Key -key and start typing:
  2. Click on the profile folder you wish to open (it will open in a window). If you only have one profile, its folder would have "default" in the name.
  1. Click the Windows Start button, and select Run….

  2. Type in:
    then click OK.

  3. A window will open containing profile folders.
  4. Double-click the folder with “default” in the name to open it.
  1. Open the Library folder for your Mac user account:
    • (OS X 10.6 or previous) Click the Finder icon in the dock. Your home folder will be selected, (usually the name of your Mac user account). In the right side of the window, click the Library folder to open it.
    • (OS X 10.7 or above) Click the Finder icon in the dock. On the menu bar, click the Go menu, hold down the option or alt key and select Library. A window will open containing your Library folder.
  2. Open the "Application Support" folder, then open the "Firefox" folder, and then the "Profiles" folder.
  3. Your profile folder is within this folder. If you only have one profile, its folder would have "default" in the name.
  1. (Ubuntu) Click the Places menu on the top right of the screen and select Home Folder. A File Browser window will appear.
  2. Click the View menu and select Show Hidden Files if it isn't already checked.
  3. Double click the folder marked .mozilla.
  4. Double click the folder marked firefox. Your profile folder is within this folder. If you only have one profile, its folder would have "default" in the name.

What information is stored in my profile?

Note: Only important information useful for recovering is described.
  • Cookies: A cookie is a bit of information stored on your computer by a website you’ve visited. Usually this is something like your site preferences or login status. Cookies are all stored in the cookies.sqlite file.
  • DOM storage: DOM Storage is designed to provide a larger, more secure, and easier-to-use alternative to storing information in cookies. Information is stored in the webappsstore.sqlite file for websites and in the chromeappsstore.sqlite for about:* pages.
  • Security certificate settings: The cert8.db file stores all your security certificate settings and any SSL certificates you have imported into Firefox.
  • Security device settings: The secmod.db file is the security module database.
  • Download actions: The mimeTypes.rdf file stores your preferences that tell Firefox what to do when it comes across a particular type of file. For example, these are the settings that tell Firefox to open a PDF file with Acrobat Reader when you click on it. For more information, see Change what Firefox does when you click on or download a file.
  • Plugin MIME type: The pluginreg.dat file stores Internet media types related to your installed plugins. For more information, see Use plugins to play audio, video, games and more.
  • Stored session: The sessionstore.js file stores the currently open tabs and windows. For more information, see Restore previous session - Configure when Firefox shows your most recent tabs and windows.
  • User preferences: The prefs.js file stores customized user preference settings, such as changes you make in Firefox OptionsPreferences dialogs. The optional user.js file, if one exists, will override any modified preferences.
  • User styles: If they exist, the \chrome\userChrome.css and \chrome\userContent.css files store user-defined changes to either how Firefox looks, or how certain websites or HTML elements look or act.

Working with profiles