http://en.kioskea.net/faq/3054-firefox-already-running-but-not-responding
Pēc tam:
http://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding
http://www.mattcutts.com/blog/how-to-fix-firefox-is-already-running-error/
http://cyberfoxbytes.today.com/2009/03/26/how-to-fix-the-firefox-is-already-running-problem/
...
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