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.

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After I downloaded Firefox 4 and I try to open Firefox, I get this error message, "plug-in object: TypeError: Components.classes[cid] is undefined". I click "OK"; Firefox opens and works just fine. Any suggestions??

Not much to add. Before Firefox will open, I get this error message, "plug-in object: TypeError: Components.classes[cid] is undefined". I click the "OK" button; Firefox opens and I have no further problems.
I use an Apple with OS v. 10.6.7 and had no problems until I downloaded Firefox 4.0

That indicates you have an add-on that is not compatible with Firefox 4. For details of how to troubleshoot that see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

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

IGet this message when I start firefox, TypeError: Components.classes[cid] is undefined

upgraded firefox a couple of days ago now i get this error message, and the upgrade file starts to download again.
message ; TypeError: Components.classes[cid] is undefined

This type of error is usually caused by an add-on you've installed. It could be anything from an antivirus link scanner like AVG Safe Search, or McAfee Site Advisor, or something similar.
Start Firefox in [[Safe Mode]]. If it functions properly in that configuration, then one of your add-ons is the culprit.
See also [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]

Error message at startup ug-in object: TypeError: Components.classes[cid] is undefined

Mac 10.5.8 When I click alias for Firefox 4.ob-12 and now Firefox 4.0 I get the following error message that halts the startup until I click "Ok".
ug-in object: TypeError: Components.classes[cid] is undefined
What's wrong?

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 > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

Recently downloaded Firefox 4. Now when loading it, I get this Java Console Message: TypeError: Components.classes[cid] is undefined I click OK and everything works OK, but this didn't happen before.

Please tell me how I can get rid of a Java Console Msg. every time I load Firefox 4 (which I just updated to). This box pops up when trying to load Firefox: TypeError: Components.classes[cid] is undefined. I have to click on OK before it will load. ANNOYING. This didn't happen until I updated to Firefox 4.

That indicates that you have an add-on that is not compatible with Firefox 4. To find out which one, use the procedure in this link - https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

After downloading 4.0 I get this message: JavaScript application can't create mcafee plug-in object: TypeError: components.classes[cid] is undefined

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

That indicates that an add-on you are using is not compatible, considering the other errors it is possibly the McAfee add-on. To confirm what add-on is causing this use the procedure in this link - https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

When i start firefox 4.0, i get a javascript application box coming up saying "TypeError: Components.classes[cid] is undefined" then i need to click ok to start firefox. Whats going on??????

When i start firefox 4.0, i get a javascript application box coming up saying "TypeError: Components.classes[cid] is undefined" then i need to click ok to start firefox. Once okay is clicked, firefox starts immediately.

This issue can be caused by an extension that isn't working properly.
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 > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

I am getting this error message when i try to open FF "ug-in object: TypeError: Components.classes[cid] is undefined"

This is the error message I get when i click to open FF after i downloaded the newest version: "ug-in object: TypeError: Components.classes[cid] is undefined" . The message is in the top left corner and not fully visible. i sent a message a few min ago so i am sending this b/c i copied the error message to help diagnose the problem.

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

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

What can I do about this:
After upgrading to firefox 6, I get this error.
When I click to open Firefox, A box open with the following error:
JAVASCRIPT Application
TypeError: Components.classes[cid] is undefined?
After I click close on the box, then Firefox will start. I really just want to get the error fixed so that when I want firefox open, I don't have to see this box anymore.

You need to figure out which add-on is causing that error and disable it until the developer of that add-on fixes it. There may be an error message about that in the Error Console, accessed through the Web Developer menu item or through {Ctrl + Shft + J}.
Also see this: 
http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes

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

Upgraded to FF4, Have windows 7, everytime I click on FF4 to go online, I get pop-up box with error message [Javascript: application] Typeerror: Components.classes[cid] is undefined...when I click OK it lets me online but this is a pain

I get an error message... [Javascript: application] upper left corner in the pop-up box, then in the body of the pop-up box it says, Typeerror: Components.classes[cid] is undefined...when I click OK it lets me online but this is a pain, also, I get the same message when I try to open another window while using FF4...Thanks and hope you can help...

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 > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

Why and how to fix this problem. firefox3.6.6 TypeError: Components.classes[cid] is undefined

When I open Firefox I get this message.
'''TypeError: Components.classes[cid] is undefined '''
Why is this happening and how do I correct it?

See :
https://support.mozilla.com/en-US/questions/818225
https://support.mozilla.com/en-US/questions/845990
https://support.mozilla.com/en-US/questions/818932

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

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

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