When I launch Firefox, Iget the following message "TypeError: components.classes['@ [cid] is not defined.

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• Firefox 4.0.1 giving "TypeError: components.classes['@ [cid] is not defined. How can I fix? Other posts about it did not solve my problem.

  I started Firefox in Mode safe mode with no addons, extensions or themes active. And it still happens. I noticed Greasemonkey is installed but can find no way to remove it - but no scripts are installed in it.

  I use AVG Antivirus and have read the web-protection component could cause this problem but have not read how to correct it. Any info would be greatly appreciated.

  Occurs whenever I open Firefox for the first time and every time I open a new browser window. Coming as at any time a web page generates a popup window. Can't when I just open a new tab or link in a new tab.

  Do a clean install (re)-:

  • Download a new copy of Firefox and save the file to the desktop.
  • Firefox 4.0.x: http://www.mozilla.com/en-US/firefox/all.html
  • Uninstall your current version of Firefox and remove the Firefox program folder before installing this copy of the Firefox installer.
  • Do not remove the data of a personal nature if you uninstall the current version.
  • It is important to remove the Firefox program folder to delete all the files and make sure that there is no problem with the files that were the remains after uninstallation.
  • It is perhaps not necessary to create a new profile, so first try if it works with your current profile, and if not then create a new profile.

  Create a new profile as a test to see if your profile is the source of 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 > Modules > Extensions & Plugins»
  
  If this new profile works then you can transfer files from the old profile to the new profile (be careful not to copy corrupted files)

  See:

  • http://KB.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

• Whenever I boot Firefox I get: JavaScript Application TypeError: components.classes['@ [cid] is not defined. What causes this and how to fix it?

  This also happens when I open another tab, which implies an impression.

  You can use, make a copy of the desktop Firefox shortcut and add a space and - safe-mode to the command line (target) in this copy of the shortcut properties.

  • http://KB.mozillazine.org/Safe_Mode

• Since the installation of Firefox 4, I get this message "TypeError: components.classes['@ [cid] is undefined" when a window should open. Also saw print and print no longer work correctly.

  Since the installation of the latest version of Firefox, this message "TypeError: components.classes['@ [cid] is undefined" appears in a box when should open a new window. In addition, what you see in the Preview Print print, is not which prints.

  Recovering important data over an old profile

  https://support.Mozilla.com/en-us/KB/recovering%20important%20data%20from%20an%20old%20Profile

  Check and tell if its working.

• AFTER DOWNLOAD FIREFOX 6 I NOW GET THE MESSAGE ' TypeError: components.classes['@ [cid] is undefined "whenever I OPEN FIREFOX - WHY?

  Firefox seems to operate normally despite the error message. How can I prevent the message from happening whenever I open Firefox? The message is important?

  Probably caused by an incompatible extension.

  http://support.Mozilla.com/en-us/KB/troubleshooting+extensions+and+themes

• After updating and loading message apears windw "TypeError: components.classes['@ [cid] is undefined" why and what to do?

  After the upgrade to Firefox 6.0
  After opening
  a small error window opens with the message
  TypeError: Components.classes['@ [cid] is undefined

  This problem may be caused by an extension that is not working properly.

  Start Firefox in Firefox to solve the issues in Safe Mode to check if one of the extensions of the origin of the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > appearance/themes).

  • Makes no changes on the start safe mode window.
  • https://support.Mozilla.com/kb/safe+mode
  • https://support.Mozilla.com/kb/troubleshooting+extensions+and+themes

• After all the steps have been made and I clicked 'launch' I get the following message "Setup has detected that a machine restate may be waiting."  Exit Setup, restart your computer and try to reinstall.  What is a 'install '? and how do I

  After all the steps have been made and I clicked 'launch' I get the following message "Setup has detected that a machine restate may be waiting."  Exit Setup, restart your computer and try to reinstall.  What is a 'install '? and how to leave it. ?  I try to install 14 items. Anita

  If present, click the ignore button and check.

  No button ignore? If possible, please post a screenshot of the error.

• Some of the icons have been replaced on my desk a Logos Reader Adobe! For example when I click on Chrome, the error message dispalayed is "ADOBE READER could not open"Chrome.exe"because it is not a file type supported or because the wire"

  Some of the icons have been replaced on my desk a Logos Reader Adobe! For example when I click on Chrome, the error message dispalayed is "ADOBE READER could not open"Chrome.exe"because it is not a supported type file or because the file has been sent as an attachment to e-mail and has not been correctly decoded).  I need help to solve this problem of Odessa.

  Hi umeshb4300232,

  Try the steps of troubleshooting mentioned in this KB doc. https://helpx.Adobe.com/Acrobat/KB/application-file-icons-change-Acrobat.html

  Kind regards

  Nicos

• After downloading 4.0 I get this message: application JavaScript is unable to create the plugin object of mcafee: TypeError: components.classes['@ [cid] is undefined

  I finished to download Firefox for my Mac OS 4.o. X.
  When I try to open a Web site, I get the message:
  [JavaScript Application] cannot create the plugin object of mcafee: TypeError: components.classes['@ [cid] is undefined
  If I click on the OK button, the site opens, but without the alert McAfee at the bottom of the window.
  I had just downloaded 3.6.16 and got box suggesting version 4.0 download for better security, but that seems to be where the problem is!

  This indicates that an add-on that you use is not compatible, considering the other errors, maybe it's the McAfee add-in. To confirm that the module is originally, use the procedure in this link - https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

• Whenever I open Firefox, I had a small window to appear and reports following error "TypeError; Components.classes['@ [' softage.ru/Skype FeExtensions; 1] is undefined

  Whenever I open Firefox, I had a small window to appear and reports following error "TypeError; Components.classes['@ ['softage.ru/Skype FeExtensions; 1] is undefined

  Remove/disable Skype add-on

  Uninstalling the modules

  • https://support.Mozilla.com/en-us/KB/uninstalling%20add-ons

  Cannot uninstall an add-on

  • https://support.Mozilla.com/en-us/KB/cannot%20uninstall%20an%20add-on

  Check and tell if its working.

• Error "TypeError: components.classes['@ [cid] is undefined" when opening of Firefox - every time that it is open!

  Since the installation of Firefox 4, I get this error message "type: components.classes['@ [cid] is undefined" whenever Firefox is open and trying to access some Web sites. Very aggravating!

  This indicates that you are using an add-on that is not compatible with Firefox 4. To find out how to solve this to find out what is causing the problem, see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

• What I can do about it: after upgrading to firefox 6, I get this error. TypeError: Components.classes['@ [cid] is undefined?

  What I can do about it:
  After the upgrade to firefox 6, I get this error.
  When I click to open Firefox, a box opens with the following error message:
  JAVASCRIPT application
  TypeError: Components.classes['@ [cid] is undefined?
  When I click close in the box, then Firefox start. I just want to really get fixed error so that when I open firefox, I can't see this box.

  You need to understand what add-on is causing that error and disable it until the developer of this add-on fixes it. There may be an error on this issue in the Console error, accessible through the developer menu item Web or {Ctrl + Maj + J}.

  See also this:
  
  http://support.Mozilla.com/en-us/KB/troubleshooting+extensions+and+themes

• Why do I get the error: error: TypeError: netscape.security.PrivilegeManager is not defined

  Whenever I open Firefox, I get the following error:
  Error: TypeError: netscape.security.PrivilegeManager is not defined

  I never had this before. Where did it come from? What it means? How can I get rid of him?
  I use Firefox 24.0 on a desktop Lenovo Vista

  Hello twowheelaj, this error is probably caused by an obsolete extension (avg toolbar may be one of them) - to verify that, please start firefox in safe mode once and see if you can reproduce this error message then. Otherwise, please try to disable your addons, until you find the good & keep this option disabled in case there is no update available for her...

  Troubleshoot extensions, themes, and issues of hardware acceleration to resolve common problems of Firefox

• [I get the following error message when I open the mine field: TypeError: Components.classes['@softage.ru/skype/SkypeFfExtension;1'] is undefined

  This only happens on the minefields, NOT on Firefox (latest version)

  This has happened

  Each time Firefox opened

  2 weeks ago

  User Agent

  Mozilla/5.0 (Windows; Windows NT 6.1; en-US; RV:2.0b2pre) Gecko/20100705/Minefield 4.0b2pre

  There are a lot of extensions that no longer work in the field of mines last nightly builds due to changes to the registration of XPCOM components.
  See http://forums.mozillazine.org/viewtopic.php?f=23 & t = 1937759

  It is a problem with the Skype extension.
  See Troubleshooting extensions and themes and problems of hardware acceleration to resolve common Firefox problems

• I get the following message when you use Safari and Firefox. Works in Chrome: "we're sorry, the link that brought you to this page is not valid."

  I'm working with my bank account online and I get to the homepage very well. When I select the online banking, estatements, I get the following message when it tries to link to the electronic statement page.
  "We're sorry, the link that brought you to this page is not valid." Chrome has no problem displaying this page, but Firefox and Safari gives me the same message.

  Note that I posted this already above, but don't not checked if she was tried.

  You may need to allow cookies from third party (visited or all).
  
  
  To view the history settings and cookies, choose:

  • Firefox > Preferences > privacy > Firefox will be: "use the custom settings for history".