Firefox will only use one profile at a time. It does this by putting a lock file in your profile folder when it starts. When you exit Firefox, the lock file is removed. If the lock file already exists when you start Firefox, or in a few other cases where the profile cannot be opened, Firefox displays an error message: "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system."
Go through your task or process list and stop each instance of the Mozilla application, or restart your computer. If that failed, Firefox may have shut down abnormally, leaving the lock in place. To fix this, open the profile folder and delete "lock" and ".parentlock" files. That's it. 2009/7/27 I am aero <aer...@gmail.com> > কোন একটি অজানা কারণে ফায়ারফক্স হ্যাং হয়ে গিয়েছিল। উবুন্টুর force quit > বোতাম চেপে (মেনুবারে এপলেট রেখেছি) বন্ধ করলাম। পরে আবার ফায়ারফক্স চালু > করতে গেলাম, কিন্তু তখন মেসেজ দিচ্ছে যে "Firefox is already running, > but is not responding. To open a new window, you must first close the > existing Firefox process, or restart your system." > পরে সিস্টেম রিস্টার্ট দেয়ার পর ঠিক হয়েছে। > > এটা কি কোন সমস্যা? আমার কি করা উচিত ছিল? > -- Angel http://fedoraproject.org/wiki/User:Angel 0DF8 3CD4 AFE3 68C6 2CDA 9F17 14B8 1A15 E5F7 73C2 Fedora -- Freedom² and rapid innovation Sent from Dhaka, Bangladesh Mike Ditka <http://www.brainyquote.com/quotes/authors/m/mike_ditka.html> - "If God had wanted man to play soccer, he wouldn't have given us arms." -- Ubuntu Bangladesh | http://ubuntu-bd.org ubuntu-bd@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bd