We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

ابحث في الدعم

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

This thread was archived. Please ask a new question if you need help.

Jave Script error when opening any page.

  • 1 (رد واحد)
  • 2 have this problem
  • 4 views
  • آخر ردّ كتبه cor-el

rodhigh
rodhigh
more options

Whenever I load a page into Firefox I get the following error message: "[javascript application] Type Error: Components Class [CID] is undefined" This has happened with the last few versions of Firefox.

Whenever I load a page into Firefox I get the following error message: "[javascript application] Type Error: Components Class [CID] is undefined" This has happened with the last few versions of Firefox.

All Replies (1)

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

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

Do you have any AVG extensions or toolbars installed?

  • Tools > Add-ons > Extensions

Start Firefox in Safe 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).