This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Buscar en Ayuda

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Este tema ha sido archivado. Haz una nueva pregunta si necesitas ayuda.

Every time Firefox starts, I receive error [JavaScript Application] error: de is null.What is this error?

  • 2 respuestas
  • 114 tienen este problema
  • 7 visitas
  • Última respuesta de armanys

armanys
armanys
more options

Every time Firefox starts I received a message:

[JavaScript Application] error: de is null


It may be because I installed few add-ons (including Greasemonkey scripts) or because of Java? I disabled add-ons (most of tem), but to no avail.

Every time Firefox starts I received a message: [JavaScript Application] error: de is null It may be because I installed few add-ons (including Greasemonkey scripts) or because of Java? I disabled add-ons (most of tem), but to no avail.

Solución elegida

Right, the problem was one of extensions installed. Problem solved!

Leer esta respuesta en su contexto 👍 25

Todas las respuestas (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

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

  • Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.
armanys
armanys Autor de la pregunta
more options

Solución elegida

Right, the problem was one of extensions installed. Problem solved!