A copy of Firefox is already open. Only one copy of Firefox can be open at a time. I cannot find the open one. was having some problems. deleted and trying to re-install. I get this message each time
Some web pages did not load correctly. (on Imac). Deleted Firefox and moved Profile to another drive to backup. Downloaded new Firefox. When I try to install, I keep getting this message-"A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I went in and searched for all occurrences of Firefox or Mozilla and deleted.
It will still not load.
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See:
- https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding
- http://kb.mozillazine.org/Profile_in_use
Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
I cannot get Firefox to run now. I backed up my Profile to another drive. Cannot create a new one as Firefox will not run. It says there is another copy running. However, I have deleted all Firefox and Mozilla files and downloaded new. When I try to run it, I get the message to close Firefox as two cannot run at once.
I did create a new Mac account logon and can run Firefox there, so something in the other account is showing Firefox is running.
I also checked in ACTIVITY MONITOR and in SETUP and there is no Firefox or Mozilla running.
So, where can this bug be hiding????