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

How to prevent Firefox opening itsef at a private browsing window every time I start my PC?

  • 1 reply
  • 1 has this problem
  • 4 views
  • Last reply by Shadow110

more options

Whenever I start or reboot my PC, Firefox automatically opens and displays the Private Browsing window. If I close it and reopen Firefox it then opens at either the previous session or a session restore window. I can't see anything in my start menu that causes this so how can I prevent this happening?

Whenever I start or reboot my PC, Firefox automatically opens and displays the Private Browsing window. If I close it and reopen Firefox it then opens at either the previous session or a session restore window. I can't see anything in my start menu that causes this so how can I prevent this happening?

Chosen solution

uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do :

Reinstall with Current Release Firefox 57.0.3 with a Full Version Installer

Please let us know if this solved your issue or if need further assistance.

Read this answer in context 👍 1

All Replies (1)

more options

Chosen Solution

uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do :

Reinstall with Current Release Firefox 57.0.3 with a Full Version Installer

Please let us know if this solved your issue or if need further assistance.