Windows 10 已于2025年10月14日停止支持。如果您正在使用 Windows 10,参见 这篇文章

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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I get this message: Only one copy of Firefox can be open at a time.

cor-el 已回复
AnonymousUser

My computer shut down suddenly. When I rebooted it I had lost all of my Firefox bookmarks. I saw the notice that this sometimes happens with security software. After I restarted the computer and nothing happened, I contacted Norton Security. They tried several things but none worked. However during the course of the 2 1/2 hour process I have lost access to Firefox completely. When I click on the icon I get the message "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I re-downloaded Firefox 3.6.8, but nothing changed. Then I tried to follow the directions about "parent folders" in a Firefox forum, but I did not find them that clear. Is there an easy way for me to recover Firefox and my bookmarks/history?

Operating system

Mac OS X

My computer shut down suddenly. When I rebooted it I had lost all of my Firefox bookmarks. I saw the notice that this sometimes happens with security software. After I restarted the computer and nothing happened, I contacted Norton Security. They tried several things but none worked. However during the course of the 2 1/2 hour process I have lost access to Firefox completely. When I click on the icon I get the message "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I re-downloaded Firefox 3.6.8, but nothing changed. Then I tried to follow the directions about "parent folders" in a Firefox forum, but I did not find them that clear. Is there an easy way for me to recover Firefox and my bookmarks/history? == Operating system == Mac OS X

所有回复 (5)

Thanks for the suggestion. However, Firefox will not load, so I cannot get to those files to see what I can do.

Okay - I have managed now to get into Firefox using another browser. I'll keep working at it.

Doesn't look like I can recover the bookmarks. I tried using the Firefox back-up, deleting profiles, etc. - but nothing seems to work.