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

Fire fox won't open after installing update. But it shows in my task manager as running

AnonymousUser

Firefox won't open after installing update 3.6.6 Solution page says problem has been solved, but the solution has been removed.

This happened

Every time Firefox opened

After installing update 3.6.6

User Agent

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)

Firefox won't open after installing update 3.6.6 Solution page says problem has been solved, but the solution has been removed. == This happened == Every time Firefox opened == After installing update 3.6.6 == == User Agent == Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)

Alle antwurden (1)

Hello Chris.

Hopefully this support article is what you need:

https://support.mozilla.com/en-US/kb/Firefox+will+not+start