Every time when i open firefox this shows up Components.classes[cid] is undefined. what is this?

can't explain any more

Probably caused by an incompatible extension that you have installed. You need to figure out which one is throwing that error and disable it until the developer of that extension fixes it.
http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes

Similar Messages

How do I fix the following error, it comes up every time I open a Firefox page; "type error: Components.classes[cid] is undefined" (JavaScript Application)

== Issue
==
I have another kind of problem with Firefox
== Description
==
how do I fix the following error, it comes up every time I open a Firefox page; "type error: Components.classes[cid] is undefined" (JavaScript Application)
== This happened
==
Every time Firefox opened
== a few months ago
==
== Troubleshooting information
==
Application Basics
Name Firefox
Version 3.6.3
Profile Directory
Open Containing Folder
Installed Plugins
about:plugins
Build Configuration
about:buildconfig
Extensions
Name
Version
Enabled
ID
Adblock Plus 1.2 true
Adobe DLM (powered by getPlus(R)) 1,6,2,49 true
AVG Safe Search 9.0.0.825 true {3f963a5b-e555-4543-90e2-c3908898db71}
AVG Security Toolbar 4.504.019.002 true avg@igeared
Fasterfox 2.0.0 false
Forecastfox 0.9.10.2 true {0538E3E3-7E9B-4d49-8831-A227C80A7AD3}
Java Console 6.0.05 true
Java Console 6.0.03 true
Java Console 6.0.07 true
Java Console 6.0.11 true
Java Console 6.0.13 true
Java Console 6.0.15 true
Java Console 6.0.17 true
Java Quick Starter 1.0 true [email protected]
Microsoft .NET Framework Assistant 1.2.1 true {20a82645-c095-46ed-80e3-08825760534b}
NoScript 1.9.9.77 true {73a6fe31-595d-460b-a920-fcc0f8843232}
Java Console 6.0.19 true
Java Console 6.0.20 true
Modified Preferences
Name
Value
accessibility.typeaheadfind.flashBar 0
browser.history_expire_days 0
browser.history_expire_days.mirror 180
browser.places.importBookmarksHTML false
browser.places.importDefaults false
browser.places.leftPaneFolderId -1
browser.places.migratePostDataAnnotations false
browser.places.smartBookmarksVersion 2
browser.places.updateRecentTagsUri false
browser.startup.homepage_override.mstone rv:1.9.2.3
extensions.lastAppVersion 3.6.3
general.useragent.extra.microsoftdotnet ( .NET CLR 3.5.30729)
keyword.URL http://au.yhs.search.yahoo.com/avg/search?fr=yhs-avg&type=yahoo_avg_hs2-tb-web_au&p=
network.cookie.prefsMigrated true
places.last_vacuum 1272511429
print.print_bgcolor false
print.print_bgimages false
print.print_command
print.print_downloadfonts true
print.print_evenpages true
print.print_in_color true
print.print_margin_bottom 0.5
print.print_margin_left 0.5
print.print_margin_right 0.5
print.print_margin_top 0.5
print.print_oddpages true
print.print_orientation 0
print.print_pagedelay 500
print.print_paper_data 0
print.print_paper_height 11.00
print.print_paper_size -134744073
print.print_paper_size_type 1
print.print_paper_size_unit 0
print.print_paper_width 8.50
print.print_printer Lexmark 4200 Series
print.print_reversed false
print.print_scaling 1.00
print.print_shrink_to_fit true
print.print_to_file false
print.printer_Lexmark_4200_Series.print_bgcolor false
print.printer_Lexmark_4200_Series.print_bgimages false
print.printer_Lexmark_4200_Series.print_command
print.printer_Lexmark_4200_Series.print_downloadfonts true
print.printer_Lexmark_4200_Series.print_edge_bottom 0
print.printer_Lexmark_4200_Series.print_edge_left 0
print.printer_Lexmark_4200_Series.print_edge_right 0
print.printer_Lexmark_4200_Series.print_edge_top 0
print.printer_Lexmark_4200_Series.print_evenpages true
print.printer_Lexmark_4200_Series.print_footercenter
print.printer_Lexmark_4200_Series.print_footerleft &PT
print.printer_Lexmark_4200_Series.print_footerright &D
print.printer_Lexmark_4200_Series.print_headercenter
print.printer_Lexmark_4200_Series.print_headerleft &T
print.printer_Lexmark_4200_Series.print_headerright &U
print.printer_Lexmark_4200_Series.print_in_color true
print.printer_Lexmark_4200_Series.print_margin_bottom 0.5
print.printer_Lexmark_4200_Series.print_margin_left 0.5
print.printer_Lexmark_4200_Series.print_margin_right 0.5
print.printer_Lexmark_4200_Series.print_margin_top 0.5
print.printer_Lexmark_4200_Series.print_oddpages true
print.printer_Lexmark_4200_Series.print_orientation 0
print.printer_Lexmark_4200_Series.print_pagedelay 500
print.printer_Lexmark_4200_Series.print_paper_data 1
print.printer_Lexmark_4200_Series.print_paper_height 11.00
print.printer_Lexmark_4200_Series.print_paper_size -134744073
print.printer_Lexmark_4200_Series.print_paper_size_type 0
print.printer_Lexmark_4200_Series.print_paper_size_unit 1
print.printer_Lexmark_4200_Series.print_paper_width 8.50
print.printer_Lexmark_4200_Series.print_reversed false
print.printer_Lexmark_4200_Series.print_scaling 1.00
print.printer_Lexmark_4200_Series.print_shrink_to_fit true
print.printer_Lexmark_4200_Series.print_to_file false
print.printer_Lexmark_4200_Series.print_unwriteable_margin_bottom 0
print.printer_Lexmark_4200_Series.print_unwriteable_margin_left 0
print.printer_Lexmark_4200_Series.print_unwriteable_margin_right 0
print.printer_Lexmark_4200_Series.print_unwriteable_margin_top 0
privacy.clearOnShutdown.cookies false
privacy.clearOnShutdown.offlineApps true
privacy.cpd.cookies false
privacy.item.offlineApps true
privacy.sanitize.migrateFx3Prefs true
privacy.sanitize.timeSpan 3
security.warn_viewing_mixed false
security.warn_viewing_mixed.show_once false
== Firefox version
==
3.6.3
== Operating system
==
Windows XP
== User Agent
==
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 ( .NET CLR 3.5.30729)
== Plugins installed
==
*-getplusplusadobe16249
*Office Plugin for Netscape Navigator
*Adobe PDF Plug-In For Firefox and Netscape
*Default Plug-in
*NPRuntime Script Plug-in Library for Java(TM) Deploy
*The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
*Shockwave Flash 10.0 r45
*iTunes Detector Plug-in
*Garmin Communicator Plug-In 2.8.1.0
*Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
*Java(TM) Platform SE binary
*Next Generation Java Plug-in 1.6.0_20 for Mozilla browsers
*Npdsplay dll
*DRM Store Netscape Plugin
*DRM Netscape Network Object

How do I fix this problem ...javascript (cid) applications.

When i am open a new window every time it showing TypeError: Components.classes[cid] is undefined

Q . TypeError: Components.classes[cid] is undefined. this create problem for me every time , so please help me to solve this problem.

That indicates that you are using an add-on that is not compatible with Firefox 4. For details of how to troubleshoot this to find out what one is causing the problem see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

I get this message after updating to Firefox 6.0"TypeError: Components.classes[cid] is undefined" in Windows 7

I upgraded to firefox 6.0 and immediately after that I got a message saying that two of my add ons 1.Bit Torrent tool Bar 2.AVG Search were not compatible with Firefox 6.0 and when this was resolved i would be informed.I agreed to this but after restarting firefox I got the above "TypeError: Components.classes[cid] is undefined".
I use windows 7.0 so could you please guide me in how to resolve this pop up.Thanks

This issue can be caused by an extension that isn't working properly.
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes
Start Firefox in [[Safe Mode]] to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode

Having this block coming up for java ,,TypeError: Components.classes[cid] is undefined what do i do to fix this issue

while downloading fire fox
it requested i update java,, which i did and upon doing so and restarting computer to have commponates installed ,,this error comes up and will not stop.. box heading JAVA SCRIPT APPLICATION WITH THIS MESSAGE....TypeError: Components.classes[cid] is undefined HOW MIGHT I FIX THIS ISSUE

This type of error is typically caused by an incompatible/malfunctioning extension. Try the procedure in the [[troubleshooting extensions and themes]] article.
The AVG safe search add-on is one that has caused this error.

I install compatibility reporter in my Mozilla firefox 5 running under Windows 7 and get message - TypeError: Components.classes[cid] is undefined, what is causing it please?

I am having to install Compatibility reporter so that Google toolbars will work. This used to be ok, but now I am getting the message-TypeError: Components.classes[cid] is undefined. I am running under Windows 7 any idea how |I can get round it please?

If you force an extension to install by overriding the compatibility then the result can be unpredicted. 
The extension may work or may not work or cause error messages like you posted. 
You always need to be careful with forcing extensions to install.
You may need to check extensions.checkCompatibility prefs on the about:config page.
* http://kb.mozillazine.org/extensions.checkCompatibility

TS1424 Every time when I open the iTunes store, it's always not responding. What do I do to make it stop?

Every time I open iTunes, and I go to the store, it always says "iTunes has stopped working." So what do I do to make it work normal again?

Hi caitlin02,
If you are having issues with an iTunes update error message, you may want to double-check that you are running iTunes 11.1.2:
Apple Support: iTunes 11.1.2
http://support.apple.com/kb/dl1614
Regards,
- Brenden

Firefox 4.0 displays an error code when launching: "TypeError: Components.classes[cid] is undefined", add-ons doesn't work and I can't open any web pages

Hello
I've been running Firefox 3.6.16 with no problems at all, and this morning decided to upgrade to Firefox 4.0, as the developer of the them I use, Foxscape, has upgraded it to work with 4.0. The installation appeared to be as normal, but when I launched 4.0, the following error message appeared: error "when launching firefox 4.0 TypeError: Components.classes[cid] is undefined". The browser launched, but while I could go to webpages if they were in my bookmarks, so no problems with my internet connection, but when I typed in a URL (for example google.co.uk) and pressed "go", nothing happened. Similarly, when I tried to go to add-ons, it was as if I hadn't clicked anything. I wondered whether it was an issue with Foxscape (although I've never had any problems before when upgrading, as the standard theme just appears) so I reverted to 3.6.16, switched the theme to standard, then tried upgrading to 4.0 again. The same thing happened, so I'm positive it's got nothing to do with Foxscape.
I run Windows Vista Home Edition on a Dell Inspiron. I also have IE 9 installed (I installed it a few weeks ago, and it's been running fine with 3.6.16). I've never had any problems with Firefox before; I'm very keen to upgrade to 4.0, and would appreciate your help in fixing this.
Thanks

Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

I have this problem every time when I open my computer; Photos for the iCloud account cannot be accessed. Review your account information in System Preferences.

processor 2.5 Ghz intel core i5
memory 4 GB 1600 Mhz DDR3
Graphics Intel HD graphics 4000 512 MB
Serial Number C1*******TY3
software OS X 10.8.5 (12F45)
my problem is, every time when I open my computer I get this note, Photo stream and it says I need to check something? And I also cannot share videos from youtube… there is no option for me to share on FB..
<Personal Information Edited by Host>

For Youtube and Facebook.
Try a restart.
Do a backup, using either Time Machine or a cloning program, to ensure files/data can be recovered. Two backups are better than one.
Try setting up another admin user account to see if the same problem continues. If Back-to-My Mac is selected in System Preferences, the Guest account will not work. The intent is to see if it is specific to one account or a system wide problem. This account can be deleted later.
Isolating an issue by using another user account
If the problem is still there, try booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up after waiting 10 seconds. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don't do them all at once.
Safe Mode
Safe Mode - Mavericks
Safe Mode - About
For Photo Stream, try System Preferences/iCloud - un-check Photos and then re-check.

Hi there I have updated to your lates version but every time I open up the browser and new windows I get this error message 'TypeError: Components.classes[cid] is undefined' although it does work but the message is very annoying

Question
Hi there I have updated to your lates version but every time I open up the browser and new windows I get this error message 'TypeError: Components.classes[cid] is undefined' although it does work but the message is very annoying

This issue can be caused by an extension that isn't working properly.
Start Firefox in [[Safe Mode]] to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
* https://support.mozilla.com/kb/Safe+Mode
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

When I open firefox 4 or a new window I get an error message "components.classes[cid] is undefined" how do I fix this

I upgraded to firefox 4 and now whenever I open the browser or a new window in the browser I get an error message that reads "Components.classes[cid] is undefined. How do I fix this message. I have reinstalled firefox 4 three times and still get the message. I am running windows 7 pro

Start Firefox in [[Safe Mode]] to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
* https://support.mozilla.com/kb/Safe+Mode
* [[Troubleshooting extensions and themes]]
If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

Everytime I open a window in Firefox 4 beta 2 I get a messeage that says TypeError: Components.classes(cid) is undefined, when I click OK it opens up the new window. How can I fix this?

Everytime I open a window in Firefox 4 beta 2 I get a messeage that says TypeError: Components.classes(cid) is undefined, when I click OK it opens up the new window.

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes). 
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]] 
 
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears. 
You can use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions. 
You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

Every time I start up Firefox, I receive the following warning/message. Java Script Application. Type Error: Components.classes(cid) is undefined. How do I correct this?

Question
Every time I start up Firefox, I receive the following warning/message. Java Script Application. Type Error: Components.classes(cid) is undefined. How do I correct this?

Do you see a Last 7 days folder?
If not then older history has been deleted. 
Firefox 5 doesn't use a time limit to store history like previous Firefox 3 versions did.

Since installing Firefox 4, I keep getting this message "TypeError: Components.classes[cid] is undefined" when a window should open. Also print and print preview don't work properly anymore.

Since installing the newest version of Firefox, This message "TypeError: Components.classes[cid] is undefined" appears in a box when a new window should open. Also, what you see in print print preview is not what prints.

This type of error is usually caused by an add-on you are using that is not compatible. It could be anything from an antivirus link scanner like AVG Safe Search add-on, or McAfee Site Advisor add-on, or something similar. To confirm what add-on is causing this use the procedure in this link:
https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes
Try Disabling the last add-on that was installed prior to upgrading to version 5.0
Check and tell if its working.

When I open Firefox, the browser does not open. Instead I get a small window that says: TypeError: Components.classes[cid] is undefined. How do I fix this?

I tried to uninstall AVG antiviral software, but it did not uninstall. Next, when I try to open Firefox I get a box popup that says:
TypeError: Components.classes[cid] is undefined.
If I click OK in that box, I can then open Firefox.
Also I can no longer update Java.
Help!

Possibly you have "AVG Safe search" extension installed as part of "AVG Free", solution involves reinstalling :AVG Free" without the Link Scanner component see
* http://kb.mozillazine.org/Problematic_extensions
* symptom was noted in https://support.mozilla.com/questions/865877
Other possibilities
* "OneClick YouTube Downloader 1.07" as reported in
*: https://support.mozilla.com/questions/864343
* "Java console" needs to be updated as reported in
*:https://support.mozilla.com/questions/863711]
* "HP Smart Print 1.0" as reported in
*: https://support.mozilla.com/questions/857283
* "McAfee Site Advisor" as noted in (also see Problematic extensions above)
*:https://support.mozilla.com/questions/802381
*a theme After switching to the default theme the JavaScript error doesn't appear. (View > Page Style > No Style or if "Firefox" button use "Alt" first to get to the View menu)
*:https://support.mozilla.com/questions/837840
*various extensions/applications but is 1 year back and Firefox 3.6.6
*:https://support.mozilla.com/questions/729606
If none of the above solve you problem use diagnostic approach...
*: https://support.mozilla.com/questions/837840

Every time when i open firefox this shows up Components.classes[cid] is undefined. what is this?

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