Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Mozilla Destek’te Ara

Destek dolandırıcılığından kaçının. Mozilla sizden asla bir telefon numarasını aramanızı, mesaj göndermenizi veya kişisel bilgilerinizi paylaşmanızı istemez. Şüpheli durumları “Kötüye kullanım bildir” seçeneğini kullanarak bildirebilirsiniz.

Daha Fazlasını Öğren

I have tried uninstalling and reinstalling Firefox several times. Every time I try to open Firefox I get an error message saying "Close Firefox"," A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

  • 2 yanıt
  • 12 kişi bu sorunu yaşıyor
  • 131 gösterim
  • Son yanıtı yazan: dougdwr

I uninstall Firefox, then reinstall Firefox, try to open Firefox, and get an error message in a popup box saying,

"Close Firefox"

"A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

I uninstall Firefox, then reinstall Firefox, try to open Firefox, and get an error message in a popup box saying, "Close Firefox" "A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

Seçilen çözüm

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:

Bu yanıtı konu içinde okuyun 👍 3

Tüm Yanıtlar (2)

Seçilen çözüm

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:

That solved the problem. Thank you very much!!!!