Yesterday I tried to open firefox and came up blank pg?? Had to use IE

I've used Firefox for 2 or 3 years without any problems. Yesterday it was slow to come up and when it did a small rectangle opened in top left corner of screen. When I clicked on middle box to expand, I had a blank screen. I've tried to open it a couple more times yesterday and again today but always get the blank screen. Having to use IE which doesn't excite me. Any ideas on what might have happened?

Unfortunately I tried that and it didn't work. Thanks for the help though. I tried to uninstall and it said I couldn't because the file is corrupt or something, but I think I finally got it uninstalled and/or deleted or whatever, but now I try to reinstall/download it again from the beginning and I can't. No matter what I do I can not get Firefox working again. No matter how many times I try to redownload it. Any other suggestions?

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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"

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 was updating Firefox from version 6 to version 7, after updating I tried to open Firefox and the message I got is this: This application has failed to start because xul.dll was not found. How can I fix this?

I was updating Firefox to the newest version 7.0.1 from version 6.0.2 I think it was, I clicked the restart Firefox button that always comes up after updating. It started updating and then Firefox never restarted like it was supposed to after it was done updating. I then tried to open Firefox and it told me "This application has failed to start because xul.dll was not found." I did have Firefox crash on maybe about 30 minutes or so earlier which bothered me because I have been using Firefox for years and never had it crash on me before but I didn't think much of it at the time it happened because I was able to go back onto Firefox and finish what I had been working on. A while later I checked for updates and updated. The first time I tried to update it didn't work though so I had to shutdown Firefox and reopen Firefox and start the update a second time. It was after the second time that when I tried to open Firefox I got that message about failing to start because xul.dll can't be found. I filed a crash report when my Firefox crashed. This would have been around 1am-2am in the morning that Firefox first crashed and then wouldn't allow me to open it after updating. I have a DELL laptop running the Windows XP operating system but the laptop is probably at least 6 or 7 years old. The laptop will no longer charge so I always have to have it plugged into an outlet. Both my laptop hard drive and my external hard drive give me messages that I am running out of disk space on my hard drive. I bought this laptop 6 or 7 years ago second hand so it could be even older. In short it's a piece of crap and it gives me all kinds of issues but I currently can't afford a new one, but I have never had any problems with Firefox and I use Firefox more than any other aspect of my laptop so it's really really bothering me. May you please help me fix it?

Unfortunately I tried that and it didn't work. Thanks for the help though. I tried to uninstall and it said I couldn't because the file is corrupt or something, but I think I finally got it uninstalled and/or deleted or whatever, but now I try to reinstall/download it again from the beginning and I can't. No matter what I do I can not get Firefox working again. No matter how many times I try to redownload it. Any other suggestions?

Tried to open Firefox and got error message: Platform version 1.9.2.15 is not compatible with minVersion 1.9.2.16, maxVersion 1.9.2.16

Have been using Firefox several years without problem. Tried to open it today and got this error message in a XULRunner box. Tried rebooting and running in safe mode with same results. There may have been an upgrade but I don't remember.

# Uninstall Firefox, but do not select the option to "Remove my Firefox personal data" - that option will delete your bookmarks, passwords and other user data
# Check if the Firefox installation directory still exists, if it does delete it.The default location on 32 bit Windows is C:\Program Files\Mozilla Firefox\
# Re-install Firefox, if you want Firefox 3.6 you can get it from http://www.mozilla.com/en-US/firefox/all-older.html

Why am I both unable to open Firefox and unable to uninstall it? I used Firefox regularly until today, but this morning I did a System Restore and other troubleshooting and now Firefox is completely unavailable to me.

I've been having lots of problems with my computer abruptly shutting down lately. This problem '''''might''''' be solved -- it's too early to tell.
When I try to uninstall Firefox, it beeps like Windows is going to uninstall it, then nothing. I close out the Window, then search for it to see if it's gone. It's still there.
I like Firefox, but now I'm forced to use IE. How can I get Firefox back? I don't want to download it until I've uninstalled what's on here now.

First, please try reinstalling Firefox over your current installation. There is very little risk of making things any worse than the system restore function has already done.
http://kb.mozillazine.org/Uninstalling_Firefox#On_Windows

WHEN TRYING TO OPEN FIREFOX, GET MESSAGE PATFORM VERSON 8.0 NOT COMPATBABLE WITH MIN VERSION 7.D MAX VERSION 7.D

I AM TRYING TO OPEN FIREFOX, AND GET A URL MESSAGE: PLATFORM VERSION 8.0 NOT COPATABLE WITH MIN VERSION 7.D MAX VERSI 7.D

If you use ZoneAlarm Extreme Security then disable Virtualization and reinstall Firefox.
*http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
See also:
*[[/questions/880050]]

After I downloaded Firefox I tried to open it and a box came up saying "Your firefox profile cannot be loaded. It may be missing or inaccessible." What should i do?

I tried opening Firefox and a box says "Your firefox profile cannot be loaded. It may be missing or inaccessible." Then Firefox doesn't open.

Try cor-el suggestion
* https://support.mozilla.com/en-US/questions/813663

I have been having this problem since the fourth of this month. I tried to open iTunes and this error came up: "iTunes was not installed correctly. Please reinstall iTunes error 7 windows error 126". If anyone can help I would greatly appreciate it.

I have been having this problem since the 4th of this month. I tried to open iTunes and this error message came up: "iTunes was not installed correctly. Please reinstall iTunes error 7 windows error 126". There is nothing else that comes up but if anyone can help or know anything about it I will greatly appreciate it.

Have you tried google for this Error Message...
http://support.microsoft.com/kb/959077

I want to close the bokkmarks side bar, I have tried to open firefox in safe mode but this does not help.

This morning I opened firefox as usual and found that a sidebar for bookmarks on the left side of this page. I did not request this to open and I want it removed from my computer. I do not like the way it uses up the space on the page. I have tried to open firefox in safe mode but his did not clear it. If I can not remove this sidebar I will want to close firefox.

There should be a little 'x' Close button in the top right corner of the sidebar.
Alternatively, Ctrl + B will close it too.

I get the error message "unresponsive script" when I try to open Firefox, and then I can only delete the message by going to Task Manager.

After I downloaded the Firefox update, when I tried to open Firefox I got the error message: "Warning unresponsive script...etc". This happens every time and the choices in the message ("continue" etc) are unresponsive. Further I can't delete the error window without going to Task Manager to end the program. The problem also disabled Internet Explorer which will now simply not load. Google Chrome is working. I assume it relates to the update since the problems (for both Firefox and IE) occurred immediately after the download.

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")

CS5 not responding after opening Bridge and Camera Raw

I have been using bridge, camera raw and cs5 since it was released. I have not any problems until this morning. I am able to open Bridge and Camera Raw, but when trying to open PS CS5, it does not respond?
Any suggestions?

Try resetting your preferences as described in the FAQ.
http://forums.adobe.com/thread/375776?tstart=0
You either have to physically delete (or rename) the preference files or, if using the Alt, Ctrl, and Shift method, be sure that you get a confirmation dialog.
This resets all settings in Photoshop to factory defaults.
A complete uninstall/re-install will not affect the preferences and a corrupt file there may be causing the problem.

When I try to open Safari, I get NCSW21 and that server can't be found. This happens everytime. I am using AirPort and have a strong internet signal. I have no problem opening Firefox and surfing the web. Only with the Safari page. Can anybody help.

Can't open Safari. I get "Can't find server". I get NCSW21 in my address bar. I am using AirPort and have a strong internet signal. I have no problem opening Firefox and surfing the web. Need help. Thanks

Hi Professor66,
I have a couple of suggestions for you regarding this issue. Here are two links to users who have posted similar questions to yours and have found their answers in the responses to their posts:
Safari hangs when loading web pages. | Apple Support Communities
https://discussions.apple.com/thread/3784708
Safari loading blank pages | Apple Support Communities
https://discussions.apple.com/thread/3899912
I would suggest that you first follow the troubleshooting that the OP did in the second link, which is to test in a new user account to see if the behavior is consistent. If it is, you may need to address the issue at a software level by re-installing Safari. More information on this process can be found in the following article:
OS X Mavericks: Reinstall apps that came with your Mac
http://support.apple.com/kb/PH14193
Thanks for coming to the Apple Support Communities!
Regards,
Braden

I get this error message when I open Firefox and when I go between tabs TypeError: PC_PREF_OBJ is undefined

I get this message when I open Firefox and when I go between tabs.
TypeError: PC_PREF_OBJ is undefined
I have tried to re-install, but that doesn't help.

If you close Firefox, then start Firefox in Safe Mode, does the problem still occur? For instructions on starting in Safe Mode, see [[Safe Mode]].
Extensions can sometimes be the cause of problems. If the problem does not occur in [[Safe Mode]], then you can disable your extensions one-by-one until you find out which one is causing the problem.
See [[Troubleshooting extensions and themes]]

I open firefox and after a long time the screen is blank and it says new tab on the top, no website will open

I have tried uninstalling & installing firefox and it still won't let me open any websites. I have used firefox for a long time and it has worked great. I did recently install Office 360, but firefox worked after it was installed. Any ideas?

Which version of Firefox are you using ?
Firefox has implemented a new, faster way of loading webpages in Version 33. This new feature is called [https://wiki.mozilla.org/Platform/GFX/OffMainThreadCompositing OMTC]. If you are experiencing black or blank webpages when you start Firefox or on some sites, you should update Firefox. Mozilla has released an updated version that fixes the problem.
If you are in Firefox and can see your menus, you can [[update Firefox to the latest version|update Firefox from the Help menu]]:
*Click the menu button [[Image:New Fx Menu]], click help [[Image:Help-29]] and select ''About Firefox''.
If you can't use the Firefox menus, you can go to [https://www.mozilla.org www.mozilla.org] using Internet Explorer or another browser to download and install the latest version.
See [[Firefox shows a black screen or blank screen after updating to 33]] for more information.
Please let us know if this solves the problem.
Thank you!

I've just tried to open Auroara and am only getting a small window stating... XML Parsing Error: undefined entity Location: chrome://browser/content/browser.xu

I've just tried to open Auroara and am only getting a small window stating...
XML Parsing Error: undefined entity
Location: chrome://browser/content/browser.xul
Line Number 540, Column 9: <button default="true"

Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
*Do not click the Reset button on the Safe mode start window or otherwise make changes.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Yesterday I tried to open firefox and came up blank pg?? Had to use IE

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