Firefox 23.0 canonical 1.0 already running not shutting down or starting up error. States its already running need to shut-down do system restart and close browser.
3 Answers
In one line:
rm ~/.mozilla/firefox/*.default/.parentlock
Explanations: You need to remove the .parentlock file in your mozilla profile:
cd ~/.mozilla/firefox
ls
This will show you one directory with a strange name, such as 12abc34d.default. Go to that directory and remove .parentlock.
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This was helpful. I found that the
*.defaultfolder only hadroot:rootpermission. After deleting the .parentLock file, I could still not launch FF. I updated the permission on the*.defaultto my user and grouproot, this fixed it. FYIchown [user]:[group] -R– TwistyJan 2, 2018 at 21:52
If you like the UI route:
1. Click the Ubuntu Logo
2. Type "System Monitor"
3. Find Firefox in the list of running applications, right-click and choose to kill the application
Go to command line:
Run this command: $ top
you'll see some graphical output, then note the processID (PID) of firefox
- then press 'k' to KILL the process
- you'll be asked to enter the processID (PID) of process you want to kill.
- Just enter the processID of the firefox, and you're ready to go ..!!
And you can use this procedure to kill any process.
sudo pkill firefox. Then try to run firefox again..pkill firefoxshould do.