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!

Die Funktionalität dieser Website ist durch Wartungsarbeiten eingeschränkt, die Ihr Erlebnis verbessern sollen. Wenn ein Artikel Ihr Problem nicht löst und Sie eine Frage stellen möchten, können Sie unsere Gemeinschaft über @FirefoxSupport auf Twitter, /r/firefox oder Reddit fragen.

Hilfe durchsuchen

Vorsicht vor Support-Betrug: Wir fordern Sie niemals auf, eine Telefonnummer anzurufen, eine SMS an eine Telefonnummer zu senden oder persönliche Daten preiszugeben. Bitte melden Sie verdächtige Aktivitäten über die Funktion „Missbrauch melden“.

Weitere Informationen

downloaded firefox but not running

more options

new computer and downloaded firefox but is not opening. tried to delete it but won't let me as it says firefox is running and I need to close it before it will uninstall. It says it is running but I can't find it, can't open it and can't uninstall it. Now what and how do I find it if it is running?

new computer and downloaded firefox but is not opening. tried to delete it but won't let me as it says firefox is running and I need to close it before it will uninstall. It says it is running but I can't find it, can't open it and can't uninstall it. Now what and how do I find it if it is running?

Alle Antworten (2)

more options

Do you have the Firefox icon on your quick launch? Close Firefox. Right click on the icon and select Open New Tab/Window. Sometimes this works. If it opens, close it by Menu > File > Exit.


This is not a cure but will make it easier if Firefox locks up in Windows. https://support.mozilla.org/questions/997866 {web link}

more options

Use another browser, download the FULL installer from

https://www.mozilla.org/en-US/firefox/all/

Check your system requirements (just in case to be on a safer side)

Save the file. Then, open the PROGRAMS FOLDER and discard the OLD FOLDERS and run the full installer.