Firefox will not open in Vista after upgrading to 9.

I updated FF to ver. 9, now it will not open at all. I have tried downloading it and re-installing, but I get an error message that: FF is already running and that it must be shutdown first. Then I tried to uninstall FF in completely, but again I get the message that it is "already running and must shutdown first." Also, I have tried to open FFin safe mode, but that does not work either. Vista all my AV is up to date. Side note IE9 and chrome work fine. Thanks.

Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
See also:
*https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding

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Firefox will not connect to internet after upgrade. The window pops up but shows "connecting " in tab. And then it sit there. Close it down and then try to reopen it and get message " Firefox already running, Exit program or shut down computer" ???

Firefox will not connect to internet after upgrade. The window pops up but shows "connecting " in tab. And then it sit there. Close it down and then try to reopen it and get message " Firefox already running, Exit program or shut down computer" ?????????????????

1st problem see http://kb.mozillazine.org/Firewalls
2nd problem, to close Firefox properly use File > Exit
:not with the [x] in upper right corner which close window
:see http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit
:if restarting use "Restartless Restart" extension as mentioned there.
 Please mark "Solved" one answer that will best help others with a similar problem -- hope this was it.

Firefox will not open new window after clicking on link

if I click on a hyperlink in an email message (Apple Mail) then Firefox will not open (if not running).
== This happened ==
Every time Firefox opened

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]]

Firefox will not open in Vista SP2 after installing software for a Brother MFC printer.

I have 7 computer network. All the machines are running Vista SP2. I recently purchased a Brother MFC 9325cw, and installed the printer/scanner drivers as well as a program called scansoft paperport on each of the machines individually.
I left out the some of the bulkier aspects of the driver package, namely the brother control center because it seems to eat up a lot ram at start up.
Since I have installed the printer driver on my computers, several of them will not open firefox.
I have tried re-installing firefox on one machine so far to no avail.
Next I will try to re-install the brother software. Has anyone else encountered this problem before?

It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container 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.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
*https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating

QT10.1 will not open .wmv file after upgrade to 10.7.4

Hi Qt 10.1 will no longer open .wmv files after upgrading to 10.7.4. I have the latest version of flip for mac. They will opwn in QT7 pro but does anybody have a fix for this problem at all? Thanks in advance.

I'm having the same issue, but do not find a 3ivx codec in the mentioned QT folder. I do, however, have these codecs listed in that folder:
AppleGVAHW.component
ApplePiletVideo.component
AppleProResDecoder.component
AppleVAH264HW.component
QuartzComposer.component
QuickTime3GPP.component
QuickTimeComponents.component
QuickTimeFireWireDV.component
QuickTimeH264.component
QuickTimeIIDCDigitizer.component
QuickTimeImporters.component
QuickTimeMPEG.component
QuickTimeMPEG2.component
QuickTimeMPEG4.component
QuickTimeStreaming.component
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QuickTimeVR.component
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Pages '08 will not open .doc documents after upgrading to Mavericks

Since updating to Mavericks Pages '08 will not open .doc documents even when created with Pages.

I am unable to check what you have on your Mac so you will have to run your own series of tests to determine exactly where the problem lies.
Starting with the file extension on the Word files.
You didn't say, but have you installed Pages 5?
Is your previous installation of Pages '08 in your Applications/iWork folder?
Peter

Firefox will not open and crashes after my lastest Windows 7 update on April 21st, 2015

After I completed the latest Windows 7 Update I have not been able to access Firefox. Upon opening the program I am given "Firefox has stopped working" message as the image shows. Never had any issues with Firefox before. I have Uninstalled and Reinstalled the latest Firefox version with the same results.
Please guide me to fix this problem
Adam

You can check if you can start Firefox in [[Safe Mode|Safe Mode]] by holding down the Shift/Options key.
*https://support.mozilla.org/kb/Safe+Mode
If you have submitted crash reports then please post the IDs of one or more recent crash reports that have a "bp-" prefix:
*bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
You can find the Report ID of recent crash reports on the "Help > Troubleshooting Information" page (about:support).
*Click the "All Crash Reports" button on this page to open the about:crashes page and see all crash reports.
If necessary then you can open about: pages via the location/address bar.
See:
*http://kb.mozillazine.org/Mozilla_Crash_Reporter
*https://support.mozilla.org/kb/Mozilla+Crash+Reporter
If you can't open Firefox, see:
*http://kb.mozillazine.org/Mozilla_Crash_Reporter#Location_of_crash_reports
*http://kb.mozillazine.org/Mozilla_Crash_Reporter#Viewing_crash_reports
*https://developer.mozilla.org/How_to_get_a_stacktrace_for_a_bug_report

Xul runner platform version is not compatible and fire fox will not open - this is after upgrading to v 5

After trying to updat from 4.0 RC2 to 5.0.1 Error message appears
error: Platform version '2.0.1' is not compatible with min version >=5.0 <=5.0.
Have uninstalled and tried to re install earlier version but now get same error message but now get is not compatible with version >=2.0 <=2.0
currently not able to run or load fire fox at all

See:
* http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
The updater wasn't able to update all the files and some were left as older versions.
You need to do a clean reinstall.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 5.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
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.
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

Android applications will not open or run after upgrading to BlackBerry 10 OS version 10.3.1

I have a BlackBerry Q10 when I install 10.2.1 same error now I upgrade then be same problem android apps not working or not run
Solved!
Go to Solution.

Hi and Welcome to the Community!
I recommend you reload your OS via AutoLoader, to the most recent version just released Friday:
http://supportforums.blackberry.com/t5/BlackBerry-10-OS-Device-Software/Upgrading-OS10-devices-using...
Be sure you take a full backup prior, and perhaps even use Ultimate Backup...sometimes LINK won't restore everything properly, so it depends on how critical your data is that is strictly on the device (e.g., SMS).
Oh, and btw...OS versions are always 4 octets, not merely 3...and there may be tremendous differences between versions that have the same 3 starting octets.
Good luck and let us know!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
Join our BBM Channels
BSCF General Channel
PIN: C0001B7B4 Display/Scan Bar Code
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PIN: C0005A9AA Display/Scan Bar Code

Firefox will not open after attempting to upgrade to v5, sys restore didn't help

Was running 3.6 with no problems, but trying to upgrade today apparently broke it. The upgrade failed for some reason (the old .exe is still the only one in the Firefox folder & I can't find any files newer than April 2010 in there), but no matter how I try to run it, nothing happens - Firefox will not open, period. I tried reverting to last week with sys restore, scanning for malware with Malwarebytes, but still nothing happens. I'm using WinXP 5.1 media edition SP2 (yes, it's been around a few years but it works for me). I'm now using Chrome which seems to run just fine, tho I miss all my plugins.

Hi lwhealon
try from Start > Run > and type to check 1 of :
firefox -safe-mode
"C:\Program Files\Mozilla Firefox\firefox.exe" -safe-mode '''or'''
"C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -safe-mode
(to enable the Run box in win 7 see: [http://blogs.msdn.com/b/tims/archive/2006/09/18/windows-vista-secret-3-bringing-back-start-run.aspx enable Run box win 7] )
also check if [http://kb.mozillazine.org/Firewalls Firewall] or/and other security software blocking firefox start (like ad-blocker, web-accelerator etc).
[http://kb.mozillazine.org/Kill_application With Firefox completely closed] (probably because you can not start it), open the [http://kb.mozillazine.org/Installation_directory application folder] (by default, C:\Program Files\Mozilla Firefox on Windows) rename firefox.exe to firefox1.exe, then double-click firefox1.exe. If Firefox runs without problems, it could indicate that your firewall is blocking Firefox.
good luck

Firefox will not open after unlocking Sempron

After upgrading to a new motherboard and unlocking Sempron processor, Firefox will not open. I have tried Firefox (safe mode) and rolled back to a previous version, but to no avail. It worked fine when I ran the Sempron 140 as a single core (even overclocked to 3.17ghz) on Biostar A785GE motherboard. I cannot find a crash ID to link to.
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; (R1 1.6); Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; SLCC1; OfficeLiveConnector.1.5; OfficeLivePatch.1.3)

Maybe you restored to a version of Firefox that crashes or still have a virus problem.
(irrc some Firefox versions specifically had problems after Windows restores)
Follow up checking for malware and then try re-installing Firefox. I would also suggest you make a copy of your [[profiles|profile]] including all folders and sub files and put it somewhere safe as it may assist in restoring your bookmarks and information.
See also
*[[backing up your information]]
* [[is my firefox problem a result of malware]]
* a typical post about malware checks: [/questions/914980#answer-302372]

I upgraded from 3.6.13 to Beta 4.0 and now Firefox will not open at all I tried to uninstall to start again but it will not uninstall either it does nothing.

I uninstalled Beta 4 and re-installed 3.6.13 now Firefox will not open at all I tried to uninstall to start again but it will not uninstall either it does nothing, I have been using Firefox for a long time but cannot resolve this problem can anyone help and give me a solution please. As I use Firefox as my web browser it is very frustrating.
The fact it will not uninstall appears to be something completely new as nobody I know who uses Firefox has ever encountered this in the past.

Did you check your security software (firewall)?
A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.
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.
See [[Server not found]] and [[Firewalls]] and http://kb.mozillazine.org/Firewalls
If necessary then also see:
* http://kb.mozillazine.org/Browser_will_not_start_up
* http://kb.mozillazine.org/Error_loading_websites

Firefox will not open unless I run it in compatibility mode (Windows XP SP 3), run it as an administrator, or launch it immediately after a reinstall (the reinstall thing only works once.) How do I fix this?

This morning, Firefox crashed. After this, when I click the Firefox icon, the hourglass appears and then nothing happens. Firefox does briefly appear in the task manager when I do this.
I tried rebooting. I tried reinstalling multiple times. (Firefox will run when I select "Launch Firefox" from the installer. Then the problem occurs again.) I tried safe mode. I have found that Firefox will work if I select Windows XP compatibility mode from the icon properties menu or if I run the program as an administrator. When I do this, Windows asks me if I want a program to be able to make changes to my computer.
I have noticed that a Windows Error Report is being generated each time Firefox will not open.

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container 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.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls

Firefox will not open up after i restored to default settings

i recently restored firefox to default settings on my profile on windows xp computer now firefox will not load on my profile but does on my fathers profile.whats up???????????

Hi jonbeme,
Thank you for your question. I understand after you reset Firefox, that Firefox will not open up on one of the accounts on this computer.
This is what happens when Firefox is Reset [https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems].
To test to see if the problem is the profile, use the Profile Manager to create a new profile. [[Use the Profile Manager to create and remove Firefox profiles]] If the problem goes away, you can then move your bookmarks and other important settings into the new profile.

I was told I had to upgrade Firefox to 4.0, downloaded the dmg, launched it and now Firefox will not open at all.

I was told I had to upgrade Firefox to 4.0, downloaded the dmg, launched it and now Firefox will not open at all. It tells me "The operation can't be completed because you don't have permission to access some of the items." Also, that "Firefox cannot be opened because of a problem." And it give a bunch of code. This is my main browser. What is happening here? My OS X is 10.6.7. Has this caused a problem?

If you right-click on your Photoshope.exe, select Properties, there should be a Compatibility tab. There you can select Windows XP, Windows 2000, Winows 98 or 95. One of these should allow you to open Photoshop 6, unless you mean CS6.

Firefox will not open in Vista after upgrading to 9.

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