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 <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
* [[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")
Similar Messages
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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
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I keep my Firefox up-to-date at all times but the last few weeks Gmail has been telling me that I am using an older version which it no longer supports even though I have the updated version. I was notified that Firefox could be updated to the newest version, which I did. After the update when I opened Firefox it told me that I needed to update to the newest version which I had already done. How can I fix this?
Glad to hear it
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When I open Firefox, the page won't load - I get an error message
404 - That's an error. I cannot open my Firefox and keep getting this error message. Am a bit of a dinosaur and unable to find answer on support site.
thanksSome problems occurs when your Internet security program was set
to trust the previous version of Firefox, but no longer recognizes your
updated version as trusted. Now how to fix the problem: To allow
Firefox to connect to the Internet again;
* Make sure your Internet security software is up-to-date (i.e. you are running the latest version)
* Remove Firefox from your program's list of trusted or recognized programs, then add it back. For detailed instructions, see
'''[https://support.mozilla.org/en-US/kb/configure-firewalls-so-firefox-can-access-internet Configure firewalls so that Firefox can access the Internet.]''' {web link} -
When I first open Firefox, it appears fine, then one second later it expands so that I cannot see any thing but the current message. The only way I seem to be able to even exit is to use the Windows Task Manager to kill the application. The other user on the same machine does not have this problem. We are both using Firefox version
Which security software (firewall) do you have?
Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
* https://support.mozilla.com/kb/Server+not+found
* https://support.mozilla.com/kb/Firewalls -
The following error message came when I tried to open Firefox and install Firefox Home.
"can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined"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).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]
* [[Troubleshooting plugins]] -
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. -
I have no trouble viewing apps in the iTunes Store on my iPad. However, every time I try to install a new app, I get an error message after a while - cannot connect to iTunes Store. This issues cropped up two days ago on my new iPad. Please help...
JUst experienced the exact same problem after changing password.Getting same message. Hope someone has an answer for this.
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I have a new MacBook Pro running OS 10.6.3. Every time I download Firefox and try to open it, I get an error message saying, "A copy of Firefox is already open." And it's not.
== This happened ==
Just once or twice
== I bought my new computer. ==
== User Agent ==
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us) AppleWebKit/531.22.7 (KHTML, like Gecko) Version/4.0.5 Safari/531.22.7Bonjour,
Je ne peux pas ouvrir Firefox. Voici le message que je reçois : " Firefox est déjà en cours d'exécution mais ne répond pas. Pour ouvrir une nouvelle fenêtre, vous devez d'abord arrêter le processus Firefox existant ou redémarrer votre système." Je ne vois pas de processus existant.
Si je me sers de copie de documents PDF et qu'il y a des liens dans le document, les liens ne fonctionnent pas.
Armande -
HI when i start Firefox none of the sites [emails,Facebook etc.] that have ticked the stay signed in box will stay logged on and i have to click the OK button each time.
my question is how can i fix this
i have tried to reinstall and this did not work
i searched the options in Firefox
i cannot find out the right button to press that will solve my problem-> Tap '''ALT''' key or press '''F10''' to show the Menu Bar
-> go to Help Menu -> select "Restart with Add-ons Disabled"
Firefox will close then it will open up with just basic Firefox. Now do this:
-> go to View Menu -> Toolbars -> unselect All Unwanted toolbars
-> go to Tools Menu -> Clear Recent History -> '''Time range to clear: select EVERYTHING''' -> click Details (small arrow) button -> place Checkmarks on '''Cookies, Cache''' -> click '''Clear Now'''
-> go to Tools Menu -> Options -> Privacy -> History section -> '''Firefox will: select "Use Custom Settings for History"''' -> REMOVE Checkmark from '''"Permanent Private Browsing mode"''' -> place CHECKMARKS on:
1) Remember my Browsing History 2) Remember Download History 3) Remember Search History 4) Accept Cookies from sites -> select "Exceptions..." button -> Click "Remove All Sites" at the bottom of "Exception - Cookies" window
4a) Accept Third-party Cookies -> under "Keep Until" select "They Expire"
-> REMOVE CHECKMARK from CLEAR HISTORY WHEN FIREFOX CLOSES
-> When using the Location Bar, suggest: select "History and Bookmarks"
-> go to Tools Menu -> Options -> Security -> place Checkmarks on:
1) Warn me when sites try to install add-ons 2) Block reported attack sites 3) Block reported web forgeries 4) Remember Passwords for sites
-> go to Tools Menu -> Options -> Advanced -> Network -> Offline Storage (Cache): click '''Clear Now''' button
-> Click OK on Options window
-> click the Favicon on SearchBar -> click "Manage Search Engines" -> select all Unwanted Search Engines and click Remove -> click OK
-> go to Tools Menu -> Add-ons -> Extensions section -> REMOVE All Unwanted/Suspicious Extensions (Add-ons) -> Restart Firefox
You can enable your Known & Trustworthy Add-ons later. Check and tell if its working. -
Even when I start firefox I have to sit here and wait for it to tell me a script on this page is not responding or has quit working. Once that happens which takes a while, I can say stop script and it moves on. I've always liked using firefox and have never had a problem in the past, however if I can't get this particular problem fixed, and I've tried many ways to do this, I may have to change to another browser. I would hope that you could find out why this is happening to me before I make that decision. One other thing, I am using the dreaded Vista OS.
Try the Firefox SafeMode. <br />
''A troubleshooting mode, which disables most Add-ons.'' <br />
''(If you're not using it, switch to the Default Theme.)''
# You can open the Firefox 4.0 SafeMode by holding the '''Shft''' key when you use the Firefox desktop or Start menu shortcut.
# Or use the Help menu item, click on '''Restart with Add-ons Disabled...''' while Firefox is running. <br />
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shft key) to open it again.''
If it is good in the Firefox SafeMode, your problem is probably caused by an extension, and you need to figure out which one. <br />
http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes -
This happens also when I open another tab that requires printing.
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 recently tried to import a cd that I got into itunes. When it imported, instead of being one album by one artist, it created multiple ablums by the same artist. Does anyone know how to fix this problem to bring all the files into one album by the same artist?
Generally all you need to do is fill in an appropriate Album Artist. For more details see my article on Grouping Tracks Into Albums, in particular the topic One album, too many covers.
tt2 -
Also receiving this error when logging on to some websites. Able to close the error screen and continue but it is aggravating.
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
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There are no other details.
https://support.mozilla.com/en-US/questions/729606
https://support.mozilla.com/en-US/questions/672099
thank you
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