Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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“.

Learn More

Firefox won't open, error message"can't find file at jar:file" etc.

  • 4 Antworten
  • 2 haben dieses Problem
  • 13 Aufrufe
  • Letzte Antwort von Tuttouomo

more options

"Firefox cannot find file@jar:file:///program files/Mozilla Firefox/omni jar!/browser config. properties." I tried to download firefox and refreshed the desktop link and still no go. Cannot get firefox to browse.

"Firefox cannot find file@jar:file:///program files/Mozilla Firefox/omni jar!/browser config. properties." I tried to download firefox and refreshed the desktop link and still no go. Cannot get firefox to browse.

Ausgewählte Lösung

Se also:


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

See "Basic Troubleshooting: Make a new profile":

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

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:

Diese Antwort im Kontext lesen 👍 0

Alle Antworten (4)

more options

That issue can be caused by an extension that isn't working properly.

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

more options

cor-el, thanks for the help. I did as you said and firefox still won't open. In safe mode the appearance tab was alresdy set to default. Bill

more options

Ausgewählte Lösung

Se also:


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

See "Basic Troubleshooting: Make a new profile":

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

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:

more options

cor-el, thank you the new profile worked! I'll try to xfer preferences now. Bill