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.

Avatar for Username

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

Wo archive tread sia. Meɖekuku bia biabia yeye ne ehia kpeɖeŋu.

Why is data being retained in the Firefox Internet cache when I always use Private Browsing ?

  • 3 ŋuɖoɖowo
  • 4 masɔmasɔ sia le wosi
  • 13 views
  • Nuɖoɖo mlɔetɔ sidb

sidb
sidb
more options

OS Windows 7, using Firefox 33.1.1. I have set "Never remember history" so always use Private Browsing mode. I use CCleaner to delete unwanted files from my PC on each reboot, and notice that despite using private browsing mode CCleaner is deleting files every reboot from Firefox's Internet Cache. This morning, for example, there were 203 files with 2805 KB of data deleted by CC Cleaner from the Firefox Internet cache. What data is Firefox storing there from private browsing sessions?

OS Windows 7, using Firefox 33.1.1. I have set "Never remember history" so always use Private Browsing mode. I use CCleaner to delete unwanted files from my PC on each reboot, and notice that despite using private browsing mode CCleaner is deleting files every reboot from Firefox's Internet Cache. This morning, for example, there were 203 files with 2805 KB of data deleted by CC Cleaner from the Firefox Internet cache. What data is Firefox storing there from private browsing sessions?

All Replies (3)

guigs
guigs
more options

Hi sidb, It is possible to view the cache at about:cache. However everything in private browsing is not saved when Firefox quits.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

If you are in private browsing mode then the location for disk cache should be empty and show the same as the memory cache.

Are you sure that this is the disk cache as there is more stored at the location where the disk cache is located?

  • C:\Users\<user>\AppData\Local\Mozilla\Firefox\Profiles\<profile>\

Note that plugins may always store data on disk in their own cache.

sidb
sidb Biabia la
more options

Thanks for both replies.