Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Om de ûnderfining foar jo te ferbetterjen is tydlik de funksjonaliteit dan dizze website troch ûnderhâldswurk beheind. Wannear in artikel jo probleem net oplost en jo in fraach stelle wolle, kin ús stipemienskip jo helpe yn @FirefoxSupport op Twitter en /r/firefox op Reddit.

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Mear ynfo

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

Firefox is already running, but not responding.

  • 3 antwurd
  • 1 hat dit probleem
  • 23 werjeftes
  • Lêste antwurd fan FredMcD

more options

Please help! I continue to get the ‘Firefox is already running, but not responding. The old Firefox process must be closed to open a new window.’ error.

I have tried everything suggested I’ve come across and I have still not been able to resolve the problem.

I have tried the following: -End Process from the Windows Task Manager Processes tab (firefox.exe will not close) -Kill task from Command Prompt -created a new profile -tried deleting the parent.lock from profile -restarted computer

None of these solutions are working! What am I missing?!

Please help! I continue to get the ‘Firefox is already running, but not responding. The old Firefox process must be closed to open a new window.’ error. I have tried everything suggested I’ve come across and I have still not been able to resolve the problem. I have tried the following: -End Process from the Windows Task Manager Processes tab (firefox.exe will not close) -Kill task from Command Prompt -created a new profile -tried deleting the parent.lock from profile -restarted computer None of these solutions are working! What am I missing?!

Alle antwurden (3)

more options
more options

Thanks Fred. I previously tried all the options in link #1 you sent.

I don’t have a Mac, I’m not sure how to translate the info from links #2 & #3 to my PC.

Link #4 didn’t open for me.

more options

kate.chambers said

Link #4 didn’t open for me.

I informed the admin.