This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

What are Firefox Profile Archives and related files?

  • 3 replies
  • 3 have this problem
  • 2 views
  • Last reply by Electrojim

more options

I regularly use Ccleaner to purge the usual leftovers, but wonder what information is held in certain Firefox 'Profile' files held in Windows (Vista) under AppData/Local/Mozilla? In particular the ones marked in the accompanying screenshot. If I rename the main Profiles heading, Firefox simply creates a new one. Thanks!

I regularly use Ccleaner to purge the usual leftovers, but wonder what information is held in certain Firefox 'Profile' files held in Windows (Vista) under AppData/Local/Mozilla? In particular the ones marked in the accompanying screenshot. If I rename the main Profiles heading, Firefox simply creates a new one. Thanks!
Attached screenshots

Chosen solution

These hold any Firefox data unique to you. Such as history, download history, where to save downloads, ect. Ccleaner does delete this data and so does Firefox when deleting history. So it is nothing to worry about and is normal. All the private information you don't want on there is being deleted by Ccleaner

Read this answer in context 👍 1

All Replies (3)

more options

Chosen Solution

These hold any Firefox data unique to you. Such as history, download history, where to save downloads, ect. Ccleaner does delete this data and so does Firefox when deleting history. So it is nothing to worry about and is normal. All the private information you don't want on there is being deleted by Ccleaner

more options

Firefox uses a pair of same-named folders in these locations:

C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\semi.random C:\Users\username\AppData\Local\Mozilla\Firefox\Profiles\semi.random

The files and folders under Roaming include bookmarks, history, passwords, add-ons, preferences, etc. The valuable stuff.

The files and folders under Local include the browser cache (mostly html and images) and various non-personal data that Firefox can (eventually will) rebuild if you remove it.

more options

Thanks, guys; that answers it!