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

Cerca nel supporto

Attenzione alle mail truffa. Mozilla non chiederà mai di chiamare o mandare messaggi a un numero di telefono o di inviare dati personali. Segnalare qualsiasi attività sospetta utilizzando l'opzione “Segnala abuso”.

Ulteriori informazioni
Questa discussione è archiviata. Inserire una nuova richiesta se occorre aiuto.
Archiviato

Firefox won't start up

janhsvec

When I try to start Firefox, the following dialog box appears:

XUL Runner Error: Platform version 128.0.3 not compatible with minVersion >= 128.0 maxVersion <= 128.0

Clicking the OK button closes the attempt to start Firefox.

Do I need to reinstall the latest version? If I do, will all my info be saved? Jan

When I try to start Firefox, the following dialog box appears: XUL Runner Error: Platform version 128.0.3 not compatible with minVersion >= 128.0 maxVersion <= 128.0 Clicking the OK button closes the attempt to start Firefox. Do I need to reinstall the latest version? If I do, will all my info be saved? Jan

Tutte le risposte (1)

Hi janhsvec,

This is a known issue caused by a corrupted installation after a failed update. The workaround is to uninstall and then re-install Firefox to fix this issue while our team is working on a more permanent fix. You shouldn't lose any data if you download the full installer from our official source.

Sorry about the inconvenience!