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

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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

Firefox 4.01 will not open in windows 7 after installing. Reports Profile missing

I have asked this before. I installed 4.01 on windows 7. Everytime I attempt to open it the system reports a missing profile and will not open. Have we identified what is happening?

# Please run "''firefox.exe -ProfileManager''" and try creating a new profile.
# More information here: [[managing profiles]].

Firefox will not open at all. After click the hourglass comes up and then goes away and nothing happens at all. Nothing will load past the desktop. I cannot get into firefox at all to enable anything or disable anything.

When i click on the mozilla icon on the desktop the arrow will spin (VISTA) and will then disappear. Mozilla will not enable or even pop up or anything. I am still looking at the desktop and not mozilla. I lick on the icon many times and nothing ever enables, still stuck looking at the desktop and no Internet. Not to bring up your rival, but IE will open half way and then say not responding and will freeze and i must restart the computer every time. I have to use opera now because IE and Mozilla will not enable and Mozilla wont even pop up or enable or anything...just the desktop and no net. ONCE AGAIN MOZILLA WILL NOT ENABLE, SO I CANNOT GO TO TOOLS OR ANYTHING.

I have exactly the same issue. After FF upgraded on its own to version 5, it won't open from start menu, taskbar, desktop icon, or even by pressing firefox.exe in program files directory. It does so by pressing a link at msn messenger, inside Outlook etc.
Disabling all addons, didn't help. Moreover, I can't start FF in safe mode or start profile manager (Start > Run> firefox.exe -ProfileManager).
OS: Windows 7 64bit
Windows Event Viewer entry details:
Faulting application name: firefox.exe, version: 5.0.0.4183, time stamp: 0x4df95302
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x8c724fa6
Faulting process id: 0xc0c
Faulting application start time: 0x01cc37fe2fae7e8b
Faulting application path: C:\Program Files (x86)\Mozilla Firefox\firefox.exe
Faulting module path: unknown
Report Id: 6e7f03eb-a3f1-11e0-8f4d-a4badb0238f6

Firefox will not open at all, even after rebooting & re-installing - IE opens normally - what can I do?

I've used Firefox since version 3 - really like it compared to others.
This morning, after booting up Firefox wouldn't open. It worked when the PC was shut down last night. The eggtimer comes on briefly, then nothing. Internet Explorer works fine, as does Mailwasher (for email) and MS Outlook, so it's not an internet problem.
I'm running XP Service Pack 3 (no, really, still), with Webroot Secure Anywhere internet security.
I've tried rebooting - no effect
I've tried removing, rebooting, and reinstalling - no effect
I've tried launching it from a link within a mail message - no effect
I've tried launching it from the Start-Run line with the ~p option as in your FAQ - no effect
I've tried re-installing Adobe Flash Player, Java, Shockwave, etc..
The closest I've got to something to go on is when trying to launch a console from Webroot, when I got "Browser launch error 1073741819" - but this could be a Webroot error code.
I'm not sure what else to do - almost all your FAQ's assume you can get into the program.
The only thing I can think is that webroot removed a threat this morning, but I can't find any saved scan log as to what it was - clutching at straws, maybe that had something to do with it?
Maybe this is linked, but i'm having to write this on a different PC because the Mozilla webpages don't display properly in IE (all the other sites I can find display normally) So the installed plug-ins won't reflect what I have on the PC in question

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

Firefox will not open or uninstall even after following instructions

iv tried uninstalling in safe mode but nothing works

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.
See [[Server not found]] and [[Firewalls]] and http://kb.mozillazine.org/Firewalls

Firefox will not open a webmail site after upgrade

Since I upgraded to Firefox 4.0.1 yesterday I cannot access my work email via Lotus Domino Web Access. Every time I try, the process begins as usual, asking for user name and password, then proceeds to the main page and begins to load but stops and gives this message: Domino Web Access Warning: Sorry, we were unable to process your request at this time. If you are unable to continue working in your mail file, please dismiss this warning and then select View, Reload from your browser's menu.
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What is opening instead of your Homepage?

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 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:<br/>[/questions/914980#answer-302372]

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.

Firefox 7 will not open in win xp, after being updated from previous version

updated to firefox 7 on win XP. now firefox will not open.
I unstnstalled firefox 7, and re-installed again, but it will not open

I have the same problem (and with Mozilla Thunderbird) running with Windows Vista OS. The non-opening problem was preceded by a long period where Firefox and other programs were taking absurdly long times, such as one minute, to open. Starting Windows in "safe mode with networking" solves the problems. Similarly, I just found that If I run msconfig.exe and select "diagnostic startup" then Firefox and Thunderbird both start and start up really fast (that is, when most services and startup programs are prevented from starting). However there is no network so they do not connect. I then turned on (in msconfig) enough processes to get networking running and Firefox and Thunderbird still start up really fast.
I am fairly certain there are no viruses on my computer, so the only other possibility is that some program/registry-entry is preventing the OS from working properly. The problem with windows that it is virtually impossible to find something like this, since the Windows OS has very weak self-diagnostics, and the registry is absurdly complicated with over half a million entries on my computer.
If you can do a "repair install" then this will probably fix the problem, but I do not think that Vista has this feature. Alternatively an upgrade of the OS might fix it, such as from Vista to Windows 7.

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]]

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 ANY site. Wont work AT ALL. Nothing seems to be working.

Firefox will not open ANY site. It worked last night, but not today. I uninstalled it many times, didn't worked. It displays the screen that says "unable to connect" yet chrome and explorer both work. I have disconnected and reconnected a few times, restarted my laptop, neither of those worked either. I have also tried turning "safe mode" off after re installing firefox, but again, that did not work. I need help :(.
Although, before this, firefox was not letting me use voice recording sites or any site that let me watch television online. It would load the commercials, but not play the episode. It wouldn't even let me upload pictures to photobucket. However, it worked using chrome or explorer.

Looks like a bunch of people have this problem. Anyone got any ideas to fix this???

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

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