Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

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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’.

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

Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window.

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Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window.

I've rebooted, reinstalled, can't get it working.

Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window. I've rebooted, reinstalled, can't get it working.

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Do you have the same issue with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf You can also start Firefox in Troubleshoot Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode

What OS? If windows, home or pro? If windows, reboot and before opening anything, open task manager and look for firefox. If it's there just kill it. What version of Firefox?