In the past 2 days I was receiving an error code when I tried to open Firefox, telling me it was an only good til 9/24/2011 and the date was 9/25/2011. The error code was: error code: sec_expired_certificate.

Secure connection failed...xml.freecause.com:443 invalid

The security certificate for the xml.freecause.com domain has expired because it was not renewed in time.
You most likely have an extension that tries to contact that server and you will have to disable that extension until the site has renewed its certificate.
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

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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 downloaded a security update & when i tried to open firefox afterwards ,I couldn't open it. have a DEP settings problem i tried to change my computer's DEP settings but was notified i couldnt for firefox,what should I do?

I was prompted to downloaded a security update & so I did. when i tried to open firefox afterwards ,I couldn’t open it. My computer told me I had a DEP settings problem.I tried to change my computer's DEP settings but was notified i couldn't for firefox. I tried the uninstall & then install Firefox again route (could not even do it in safe mode since i can't even open firefox)but still had the same problem afterwards. What should I do?

Do a clean (re)install and delete the Firefox program folder (C:\Program Files\Mozilla Firefox\).
Download a fresh Firefox copy and save the file to the desktop.
*Firefox 10.0.x: http://www.mozilla.org/en-US/firefox/all.html
Uninstall your current Firefox version, if possible.
*Do NOT remove personal data when you uninstall the current version or you lose your bookmarks and other data because all profile folders will be removed.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
*It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
*http://kb.mozillazine.org/Uninstalling_Firefox
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile Folder and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

I get an error message when I try to open Firefox, telling me I cannot have multiple copies open.

I'm using a G5 Power Mac. I have several internal hard drives. I also have two copies of Firefox. I have started up using a different drive and now when I try to open Firefox, I get the message that I cannot have multiple copies of the program open at the same time, but there not...

See: http://support.mozilla.com/en-US/questions/796303
The user-agent detection was incorrectly identifying FF4 as a mobile browser, in turn redirecting to a mobile version. Install the following addon to workaround this problem until it's fixed: https://addons.mozilla.org/en-us/firefox/addon/xhtml-mobile-profile/
Barb

When I tried to open firefox nothing happens. I was able to open another type of browser but not firefox.

Firefox suddenly closed on me while trying to browse a page. When I tried to reopen it nothing happend. I even tried launching from the task manager Nothing. I have loged off and restarted my computer and uninstalled and reinstalled firefox. Still nothing. It's not my internet because I'm browsing fine on explorer. Firefox is my favorite browser and i would hate to not have it but if it does not work I will have to change browsers.

Hi prubright, '''try Firefox Safe Mode''' to see if you can start firefox with that way. [[Troubleshoot Firefox issues using Safe Mode|Firefox Safe Mode]] is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).
Try to start Firefox in Safe Mode as follows onWindows: Hold the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
;[[Image:SafeMode-Fx35]]
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]] article to find the cause.
''To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
'''otherwise''', try to boot the computer in [http://windows.microsoft.com/en-us/windows/start-computer-safe-mode#start-computer-safe-mode=windows-7 Windows Safe Mode with network support] (press F8 on the boot screen) and then see if that allows to start firefox.
thank you

When i try to open firefox i get a message that says Windows has encountered a problem and will notify when there is a solution. Then you can click on the explanation and it says DEP will not allow it to open. Can you tell me how to fix this?

I was able to install and have an icon on my desktop. When i click on it it automatically pops a box up that says: Firefox has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. Then it highlights an icon at the bottom to show what the problem is and it is DEP (data execution prevention. I tried a few suggestions there but it didn't work. So it said to see if there is a download version compatable with DEP

See:
* https://support.mozilla.com/en-US/kb/Firefox%20crashes%20when%20you%20open%20it

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")

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?

Getting an error message about a missing file when I try to open Firefox

When I tried to open Firefox today I received a message about a missing file (Wrusr.ddl) and that Firefox was not able to open. I tried uninstalling and reinstalling but it did not work. I have no idea what that file is or where is went. I used Firefox 2 days ago and it was working fine. The only thing that changed between then and today was that I renewed my antivirus software but I definitely did not delete any files and I made sure that Firefox is allowed to access the internet. I've been using that same software (Webroot) with Firefox for years and never had any issues before today. Any help would be greatly appreciated! I have included a screenshot of the error message below.

hello angelag.132, the WRusr.dll file is part of Webroot SecureAnywhere - try to reinstall or uninstall that software.

When I try to open firefox, the taskbar icon expands and associated sound starts to play, but the window itself doesn't appear.

I run Windows 7. I installed Adobe CS4, and when I tried to open Firefox after, got a popup window with a list of errors. I don't remember what they were specifically, but I believe they related to the Adobe flash plug-in. I restarted the computer, and subsequently got even less: the icon in the taskbar exanded, associated sound from the webpages I had tabbed started to play, but the window itself did not appear, not even in the preview. However, it closed normally when I clicked the red X in the preview window or when I right-clicked the icon and selected Close Window
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; Media Center PC 5.0; SLCC1; .NET4.0C)

See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs

After my macbook was serviced, when I tried to open CS6, it prompted me to key in the serial number. After keying in, I got error message saying the serial number is invalid. However I have checked that it is correct.

After my macbook was serviced, when I tried to open CS6, it prompted me to key in the serial number. After keying in, I got error message saying the serial number is invalid. However I have checked that it is correct.

First be sure login and password are OK. Sometimes the address starts wit "http://..." and sometime starts with "ftp://...". Try both normal FTP access and Scure FTP access (SFTP). At the end, contact the site's provider.

I had a Microsoft tech access my computer remotely to resolve issues with my hotmail acct. There were files that needed to be deleted and he also changed some settings. Later, when I tried to open InDesign I received the following error: AMT Subsystem

I had a Microsoft tech access my computer remotely to resolve issues with my hotmail acct. There were files that needed to be deleted and he also changed some settings.
Later, when I tried to open InDesign I received the following error:
AMT Subsystem Failure
The licensing subsystem has failed catastrophically. You must reinstall or call customer support.
I rebooted the computer and tried again:
Licensing for this product has stopped working.
You cannot use this product at this time. You must repair the problem by uninstalling and then reinstalling this product or contacting your IT administrator or Adobe customer support for help.
I can access Acrobat and MS Office programs, it's just the CS3 programs that I can't access. Can I uninstall and then reinstall CS3 without an access (un-lock) code?

Use the trackpad to scroll, thats what it was designed for. The scroll bars automatically disappear when not being used and will appear if you scroll up or down using the trackpad.
This is a user-to-user forum and most people will post on here if they have problems. You very rarely get people posting to say there update went smooth. The fact is the vast majority of Mountain Lion users will not be experiencing any major problems with the OS, or maybe with apps which are not compatible, but thats hardly Apple's fault if developers don't update their apps.

When I attempt to open firefox an error message appears telling me that firefox is already running, but I can't find it running. How do I do so or in any case close the already running Firefox process?

When I attempt to open Firefox instead of Firefox opening, an error message appears saying "Firefox is already running but isn't responding. To open another window please close the existing Firefox process or restart the system.", but I can't find that process of Firefox in order to kill it, and after restarting the system there is still the problem. I have found an emergency fix to at least get online, and that is to use"Firefox_Profile_Manager" in the start menu's "run" start menu, but the
Firefox that then opens is that one doesn't carry over what I had in my bookmarks but starts bookmarks anew.

Sounds like it is hanging when you exit and later try to restart Firefox.
* How to stop the running Firefox process
** In Task Manager, does firefox.exe show in the '''Processes''' tab?
** See: http://kb.mozillazine.org/Kill_application
**Windows 7 users: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
* What may cause Firefox to hang at exit
**Windows 7 Task Manager: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
** http://support.mozilla.com/en-US/kb/Firefox+hangs
** http://kb.mozillazine.org/Firefox_hangs
** https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding
* You may need to try Firefox Safe Mode
** You may need to use '''Safe Mode''' to locate the problem: ***See: http://kb.mozillazine.org/Safe_Mode
***Firefox 4 users, hold the Shift key while clicking the Firefox 4 desktop icon to enter Safe Mode.
***Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox.
****In Firefox 4, Safe Mode also disables Plugins and Hardware Acceleration.
****If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''before''' starting Safe Mode (In Firefox 4, Tools > Add-ons > Appearance). See: http://support.mozilla.com/en-US/kb/Using%20themes%20with%20Firefox#w_managing-themes-and-personas
****When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode".
****Test to see if the problem you are experiencing is corrected.
*** If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it
***#by enabling '''one at a time''' until the problem reappears.
***#You can also enable a few at a time (3-5), keeping track of what you just re-enabled to see if the problem re-occurs; this will help narrow down the possibilities if you have a large number of add-ons.
***#'''You MUST close and restart Firefox after EACH change''' via File > Restart Firefox (on Mac: Firefox > Quit).
***#You can use "Disable all add-ons" on the Safe Mode start window.
**See the following for more information
*** http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes
*** http://support.mozilla.com/en-US/kb/Troubleshooting+plugins
*** http://support.mozilla.com/en-US/kb/Basic+Troubleshooting
 
 
'''You need to update the following:'''
*Adobe Shockwave for Director Netscape plug-in, version 11.5
*Adobe PDF Plug-In For Firefox and Netscape "9.3.2"
*Shockwave Flash 10.2 r153
*Next Generation Java Plug-in 1.6.0_17 for Mozilla browsers
#'''''Check your plugin versions''''' on either of the following links':
#*http://www.mozilla.com/en-US/plugincheck/
#*https://www-trunk.stage.mozilla.com/en-US/plugincheck/
#*'''Note: plugin check page does not have information on all plugin versions'''
#*There are plugin specific testing links available from this page:
#**http://kb.mozillazine.org/Testing_plugins
#'''Update Shockwave for Director'''
#*NOTE: this is not the same as Shockwave Flash; this installs the Shockwave Player.
#*Use Firefox to download and SAVE the installer to your hard drive from the link in the article below (Desktop is a good place so you can find it).
#*When the download is complete, exit Firefox (File > Exit)
#*locate and double-click in the installer you just downloaded, let the install complete.
#*Restart Firefox and check your plugins again.
#*'''Download link and more information''': http://support.mozilla.com/en-US/kb/Using+the+Shockwave+plugin+with+Firefox
#'''Update Adobe Reader (PDF plugin):'''
#*From within your existing Adobe Reader ('''if you have it already installed'''):
#**Open the Adobe Reader program from your Programs list
#**Click Help > Check for Updates
#**Follow the prompts for updating
#**If this method works for you, skip the "Download complete installer" section below and proceed to "After the installation" below
#*Download complete installer ('''if you do NOT have Adobe Reader installed'''):
#**SAVE the installer to your hard drive (save to your Desktop so that you can find it after the download). Exit/Close Firefox. Run the installer you just downloaded.
#**Use either of the links below:
#***https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox ''(click on "Installing and updating Adobe Reader")''
#***''Also see Download link''': http://get.adobe.com/reader/otherversions/
#*After the installation, start Firefox and check your version again.
#'''Update the [[Managing the Flash plugin|Flash]] plugin''' to the latest version.
#*Download and SAVE to your Desktop so you can find the installer later
#*If you do not have the current version, click on the "Player Download Center" link on the "'''Download and information'''" or "'''Download Manual installers'''" below
#*After download is complete, exit Firefox
#*Click on the installer you just downloaded and install
#**Windows 7 and Vista: may need to right-click the installer and choose "Run as Administrator"
#*Start Firefox and check your version again or test the installation by going back to the download link below
#*'''Download and information''': http://www.adobe.com/software/flash/about/
#**Use Firefox to go to the above site to update the Firefox plugin (will also install plugin for most other browsers; except IE)
#**Use IE to go to the above site to update the IE ActiveX
#*'''Download Manual installers'''.
#**http://kb2.adobe.com/cps/191/tn_19166.html#main_ManualInstaller
#**Note separate links for:
#***Plugin for Firefox and most other browsers
#***ActiveX for IE
#'''Update the [[Java]] plugin''' to the latest version.
#*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)
#**'''''Be sure to un-check the Yahoo Toolbar option during the install if you do not want it installed.
#*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates
#* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml
#* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Firefox_:_FAQs_:_Install_Java#Multiple_Java_Console_extensions
#*Java Test: http://www.java.com/en/download/help/testvm.xml

Error when I try to open Firefox. Says Firefox is running in the background and cannot open. Suggests closing that window or restart system. This has happened several times recently. I reinstalled but am still getting the error. Any thoughts?

I am getting an Error when I try to open Firefox that Says Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system. This has happened several times recently. I deinstalld and reinstalled but am still getting the error. Any thoughts?

This happens to me as well. However, I have a shortcut on my desktop as well as my quick start bar. When this has happened to me, I can usually log back in without restarting, by using the shortcut on the desktop rather than the usual quick start bar.
I know this sounds weird, but it has worked for me about 80% of the time.

When I tried to open PS CC2014, it flashed a bit then quit, same with DW and INDD ... I also got this error message: Adobe creative cloud is needed to resolve this problem. However, it is missing or damaged. Please download and install a new copy of the C

This morning when I tried to open my CC2014 Photoshop, it started to open, then quit suddenly. Same with Dreamweaver and InDesign. I am a professional and do not have the time to screw around with this. When I tried to run CC app, I get an error that says "Adobe creative cloud is needed to resolve this problem. However, it is missing or damaged. Please download and install a new copy of the Creative Cloud from 'http://www.adobe.com/go/adobecreativecloudapp'." I did so and tried to run the app and got the same error. I tried the cleaner and it removed all of my apps, then I tried to install again, and got the same error. I am getting desperate now, I have clients waiting for their projects. I need help, please.

Allisonf55952352 have you utilized the steps listed in Error: "Failed to install" | Creative Cloud Desktop to resolve the current error? If not do you have any questions regarding the steps listed with the document?

In the past 2 days I was receiving an error code when I tried to open Firefox, telling me it was an only good til 9/24/2011 and the date was 9/25/2011. The error code was: error code: sec_expired_certificate.

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