Backing Up the Firefox Profile Data

Backing up your Profile is essential in the event that Firefox, or your OS may crash, causing the loss of Profile data. Backing up the entire Firefox Folder is the recommended approach, if hard drive space is not an issue.

The frequency of backups would depend on the frequency of changes you make in your Preferences, Bookmarks, etc. If you make daily changes in your Profile, then make daily backups.

Create a "Backup" Folder on your HD for this purpose. Do not, however, back up the Cache Folder, or the XUL.mfl file. Before backing up your Firefox Folder, delete the entire Cache Folder, and the XUL.mfl file. Firefox will rebuild the Cache Folder, and XUL.mfl File each time they are deleted.

The Firefox Folder to back up is located here:

Windows 2000 and Windows XP
C:\Documents and Settings\user_name\Application Data\Mozilla\Firefox

Windows ME/98/98SE/95
C:\WINDOWS\Application Data\Mozilla\Firefox

For the new user, "making a backup" is not a familiar term, and there is uncertainty in how it is accomplished. To back up the Firefox Folder, one would simply right click the Firefox Folder, select "Copy". Next, browse to the newly created "Backup" Folder, right click, and select "Paste". If HD space is an issue, but you have storage media such as a CD-RW, or Zip drive, then you can use that, or any other storage media for backing up.

If you have only floppy disks for storage, then backup the following files:

bookmarks.html file

Remembered User Names and Passwords:
signons.txt (Password data)

Form Fill
somenumber.w (Form Fill data)



New Cookie and Image Permissions

Client Certificate Database

Key Database

User Customization files
(Only if you have created these files, and added your own customizations.)

If you have problems, then post your questions on the:

WindowsBBS Netscape and Mozilla Forum.
I'm a Moderator on the Forum, and along with the other informed Netscape and Mozilla users and members,
will be happy to provide you with any further assistance you might require.


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