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

Firefox leaves behind cookies and form& search history?

  • 4 replies
  • 1 has this problem
  • 2 views
  • Last reply by cor-el

more options

I have Firefox set to Never remember Form & search history, delete cookies after closing, delete cache after closing. However if I do and scan with Ccleaner I notice that Firefox seems to leave behind cache, cookie, and Form data? Why is it not being fully deleted? Are they just empty files?

I have Firefox set to Never remember Form & search history, delete cookies after closing, delete cache after closing. However if I do and scan with Ccleaner I notice that Firefox seems to leave behind cache, cookie, and Form data? Why is it not being fully deleted? Are they just empty files?

Chosen solution

SQLite files are never deleted or reduced in size if content is deleted, so you can't tell by their presence if any data is left in it. There may some records marked as deleted still left in the file that wouldn't show in the user interface. You would have to check the files with a hex viewer to verify that.

I don't know about the jumplist cache. You can possibly disable this feature.

  • on about:config: browser.taskbar.lists.enabled = false
Read this answer in context 👍 0

All Replies (4)

more options

This is just from posting this question, via private browsing, closing Firefox waiting a few minutes and then doing a scan with Ccleaner.

more options

First, check the settings; about:preferences#privacy

Close Firefox, wait a few minutes. Then restart. Type about:permissions <Enter> in the address bar, and poke around. What do you find?

more options

Chosen Solution

SQLite files are never deleted or reduced in size if content is deleted, so you can't tell by their presence if any data is left in it. There may some records marked as deleted still left in the file that wouldn't show in the user interface. You would have to check the files with a hex viewer to verify that.

I don't know about the jumplist cache. You can possibly disable this feature.

  • on about:config: browser.taskbar.lists.enabled = false