-> "Firefox is already running but is not responding" error - How to fix

-> Profile in use

• http://kb.mozillazine.org/Profile_in_use

Check and tell if its working.

Yes it says it is running but not responding when I ask the computer to restart, I don't know how to stop it on Linux - ctrl/alt/Delete to stop it on windows but is there the same kind of thing on linux?

Restart your system OR See the following for an alternative to CTRL + ALT + DEL

• http://www.blog.highub.com/linux/ubuntu-equivalent-to-task-manager/
• http://www.linuxquestions.org/questions/linux-newbie-8/is-there-a-linux-task-manager-equivalent-to-you-know-whos-354722/

Check and tell if its working.

Thanks 007, I'll sort it out eventually. Waiting to see what happens today, tried a few things.

same here, killed the proces did work as a workaround but eventually deleted the lock and .parentlock file from the .mozilla/firefox/(insert).default folder

Thanks Remi76, that seems to have fixed it :)

Oh, the ctrl alt delete version of linux is : system/admin/system monitor

Or you can open a terminal box and use: "killall firefox" or what proces you want to kill.

Thanks that's good to know, the problem comes back so next time I'll try that, thanks again.

Well its a workaround till the proper bug-fix is issued, with restart of Firefox as well as computer shut-down firefox-bin is still prompted to be running again over here now.

After deleting the .parentlock file, firefox is running fine again.

It would be nice if there was a clean way to recover after a crash. Now we also have the bookmark database that is getting corrupt and needs to be cleaned up. I like the pop up bar explaining what to do to recover, but a command line option to go in your profile and remove lock files and recover the bookmark database would be nice...

I had this problem too. I have fixed it by removing Personas. Use the Default setting not an image. Also to restart Firefox without restarting Ubuntu go to System - Administration - System Monitor andclick on Firefox.bin then End Process. After that you can restart Firefox.

I have the same problem with Firefox 3.6.24. It happens every single time I close firefox. The process name on my system is firefox-bin, so "$ killall firefox-bin" is the command that I run to close the process.

I just disabled all of my addons and plugins and narrowed the problem down to Shockwave Flash 11.1 r102. Disabling the plugin stops the problem.

Ubuntu 10.04 Found I had the Icedtea java plugin and Sunjava6 plugin installed. Removed Icedtea (using synaptic or the software center, so it is removed completely.) and all is well again. Don