Can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined

I updated to Firefox 4.0 and ever since then, I get this message when I try to open Firefox:
can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined
I have a Mac and have McAfee protection for Mac. This problem did not happen before I updated Firefox. Once I click on "OK" Firefox opens.

This issue is most likely caused by a McAfee extension that isn't working properly and you will have to disable the extension that causes it.
You can also check if there is an update available from McAfee that fixes this problem.

Similar Messages

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    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

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    The following error message came when I tried to open Firefox and install Firefox Home.
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    This issue can be caused by an extension or plugin 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).
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    See:
    * [[Troubleshooting extensions and themes]]
    * [[Troubleshooting plugins]]

  • Error message when opening FF: can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined

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    This issue is most likely caused by a McAfee extension that isn't working properly and you will have to disable the extension that causes it.
    You can also check if there is an update available from McAfee that fixes this problem.

  • 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.
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    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

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    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).
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    See:
    * [[Troubleshooting extensions and themes]]

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    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]]

  • After FF 4.0 upgrade, I get "ug-in object: TypeError: Components.classes[cid] is undefined" every time I open it (MAC OS)

    I recently upgraded to FF 4.0. Now I get an error every time I open it.

    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

  • 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: <br />
    http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes

  • 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).<br />
    See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]<br />
    <br />
    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.<br />
    You can use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.<br />
    You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")<br />

  • 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 am getting an error message when I open Firefox 5 (Win.Vista) "TypeError:Components.classes[cid] is undefined." How can I get rid of this? Thank you.

    Only started since the upgrade. Windows Vista Home 32 bit.
    The error message reads:
    "TypeError:Components.classes[cid] is undefined."

    Try the suggested idea above. I just disabled all the add-ons which were not compatible with FF 5 and did a FF restart. That fixed the problem. I then enabled each one, one at a time, with a FF restart until the problem came back. I then disabled that add-on.

  • Get error "TypeError: Components.classes[cid] is undefined" and can't load web pages. Problem with Firefox 5?

    I tried repeatedly to load Firefox 5. The Error "TypeError: Components.classes[cid] is undefined" keeps coming up. The browser loads but any URL I enter doesn't load. Sites activated by buttons do load. Internet Explorer works.

    07-05-11 When I turned on my laptop (Vista) this morning, I got a Start in Safe Mode and Repair message so I did. It suggested a System Restore, I hit OK. When it started like normal, I waited a few minutes then TRIED to launch Firefox 5.0 but kept getting a Mozilla Crash Report dialogue. So I instead opened Firefox 4.0b12 --error free-- so I could get here to get help. When I tried the Run... firefox.exe -profilemanager step, I get the subject error. When I try to open FF 5.0 in Safe Mode by holding down the shift key simultaneously, I get the subject error and no launch (though no Crash box either). I will try to let the FF 5.0 Updater run when it appears again but it never lets me choose when to Ask Again so I don't think it'll show again until tomorrow. Sigh. Oh, and like someone at a different version of this error blog re WinVista 32bit, now I'm getting the issue of Enter not executing the URL typed in the address bar; I had to click the arrow.
    I hope the Update is to fix this problem.

  • 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

  • Getting error message when starting Firefox. Msg as follows: TypeError: Components.classes[cid] is undefined (using on Windows 7) Help?

    Getting the following error message when I start Firefox. ''TypeError: Components.classes[cid] is undefined''
    Do not know where to go to fix this. Running my laptop on Windows 7.

    This issue can be caused by an extension that isn't working properly.
    Start Firefox in <u>[[Safe Mode]]</u> 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

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