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

when I try to open up firefox it just starts blinking like mad, then say's firfox is already running when it's not. I have tried uninstalling and reinstalling and it did not work. I can open internet explorer

more options

when I start Firefox, it just blinks like crazy and won't do anything. I have gotten a message reading that Firefox is already running. internet explorer still is working

This happened

Every time Firefox opened

== a few days ago. Can't remember if it started before or after I deleted macafee and added norton or not

when I start Firefox, it just blinks like crazy and won't do anything. I have gotten a message reading that Firefox is already running. internet explorer still is working == This happened == Every time Firefox opened == a few days ago. Can't remember if it started before or after I deleted macafee and added norton or not

Chosen solution

I don't know what might be causing the problem, but you could try opening FF in Safe Mode. I'm not sure if I can help if that doesn't work.

Read this answer in context 👍 0

All Replies (3)

more options

Chosen Solution

I don't know what might be causing the problem, but you could try opening FF in Safe Mode. I'm not sure if I can help if that doesn't work.

more options

I have this problem too: when I have used and shut down FF and then try to start it again, I get the message that FF is still running, while it's not. Using Windows task manager, I can see that the process is in fact still running. In order to startup startup FF again, I have to end this process manually. This problem is really annoying since I open and close FF several times a day. I run Windows 7.

more options