Quick Tip: Backup Firefox Preferences

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You may not have realised this until now but Mozilla Firefox has its own version of the Windows Registry, where all your preferences are stored. In the browser, it can be accessed by typing in the address bar about:config

Backup Firefox Preferences

But what, in the future, if you have to re-install Firefox from scratch? You may have spent a long time tweaking Firefox to get it the way you want it and if you subsequently lose all your preferences, then you would have to start again from the beginning. This would throw me into a fit of rage but I discovered recently there is a way to make a backup of your “about:config” preferences in case anything goes wrong.

Just navigate to your Firefox profile folder in your Windows Explorer. For me, it’s under

Documents and Settings -> Mozilla -> Firefox -> Profiles

However, it may be different for you, depending on how you installed Firefox on your system.

When you have located the profile, locate a file called prefs.js. This is the file containing all your settings and preferences. Just copy that file to somewhere safe such as a USB stick, a re-writable CD disk or even just another location on your PC. Remember to update this file on a regular basis with your latest settings.

If you subsequently lose your preferences on Firefox, just drag your copied prefs.js file back into the Firefox profile. Windows Explorer will tell you that a prefs.js file already exists and would you like to replace it with your copied file? Say yes and your preferences will be updated the way you want them again.

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Comments (12)
  • MP

    Does this method backup bookmarks as well?

    • Mark O’Neill

      No, it doesn’t. To back up bookmarks, I suggest you use something like Foxmarks.

  • mymytri

    Good tip here.I use FEBE for fewdays and it works good till now.

  • Fernando

    Go up a couple levels. You should see a folder called profiles and a few other folders. These contain (to my knowledge) all your firefox extensions, etc. I tested it and it works like a charm. (I got another Windows account’s firefox settings + extensions running.

  • A Non

    Or you could use MozBackUp: mozbackup.org/

  • הורדות לסלולרי

    interesting, thank for the info

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Affiliate Disclamer

This review may contain affiliate links, which pays us a small compensation if you do decide to make a purchase based on our recommendation. Our judgement is in no way biased, and our recommendations are always based on the merits of the items.

For more details, please read our disclosure.