Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

ابحث في الدعم

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

I mistakenly reset Firefox while it was sandboxed and now can't access history or bookmarks and don't know how to correct the apparent security conflict.

  • 3 ردود
  • 2 have this problem
  • 1 view
  • آخر ردّ كتبه SueRU43

more options

Firefox has been very slow and the help topics suggested resetting it. Unfortunately, I forgot to do this out of Sandboxie. Now upon opening Firefox, I get the message that "bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security systems can cause this problem." I am also instructed to close everything down and fix the problem, but don't know how to do this. I can access bookmarks and history if I open Firefox unsandboxed, but I don't want to do this.

Firefox has been very slow and the help topics suggested resetting it. Unfortunately, I forgot to do this out of Sandboxie. Now upon opening Firefox, I get the message that "bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security systems can cause this problem." I am also instructed to close everything down and fix the problem, but don't know how to do this. I can access bookmarks and history if I open Firefox unsandboxed, but I don't want to do this.

All Replies (3)

more options

You can check for problems with the places.sqlite database file in the Firefox Profile Folder.


Did Firefox move the profile folder to the desktop (Old Firefox Data) or did this fail as well?

more options

Thank you. The problem seems to have resolved itself.