Firefox will close a minute or so after I go on my gmail

After I open Firefox and get on my e-mail, Firefox just closes and everything ends. I have submitted a report as it is requested after each time it quits. I also tried to get an upgrade, but it said my computer's operating system wouldn't take it. Not so, I have 10.6 (snow lepard). Why won't it download?

Troubleshooting extensions and themes
* https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes
Download Firefox 5.0.1
* http://www.mozilla.com/en-US/firefox/new/
* http://www.mozilla.com/en-US/firefox/central/
* http://www.mozilla.com/en-US/firefox/fx/
* http://www.mozilla.com/en-US/firefox/all.html
Installing Firefox on Mac
* https://support.mozilla.com/en-US/kb/Installing%20Firefox%20on%20Mac
Check and tell if its working.

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After clicking "close" X, a message appears then disappears too quickly to read. It begins "Firefox will close now..." The word "security" appears in the next line. What is the rest of this message and should I be concerned about "security"?

none further

The full message that was almost impossible for me to read was: “'''Firefox will close now. Please standby while BetterPrivacy checks your hard disk for LSO cookies…'''”
To see if your message is the same or different:
1. Open Firefox
2. Press and hold the Shift key with your left hand
3. Close Firefox
4. Then, as soon as the message appears, press the Print Screen key with your right hand
5. Open the Microsoft Paint program, go to the Edit Menu and press Paste
6. A box with the full message should appear. If not, continue to open and close Firefox and hit Shift/Print Screen until you time it just right and the message will appear when you paste it into Paint
There would not appear to be any security concerns with the message posted above
There may be security concerns if your message is different.

Firefox will close when i close the window but the process doesn't shutdown ever since i had updated to FF25

I am running Win. 8.1 and had no issues with FF 24. Since upgrading to FF 25, firefox will appear closed when i close the window but the process doesn't shutdown. I have to go into Task Manager to end the process. I can then launch it again.

SOLUTION (possible).
Hi all. I had this problem as well. I currently run FF26. A week or so ago, out of nowhere FF wouldn't exit - the window would close but firefox.exe process would keep running in the background using about 50% of CPU. Not sure if it's connected, but just prior to that I clicked on a link on Facebook that looked like spam website, nothing happened, site loaded (sort of, all I saw was a msg - Please Wait...) but nothing happened, I have Eset antivirus and it monitors network traffic and files for viruses, so maybe it prevented my PC getting infected...
So, I had this problem for a few days, was searching the net for solutions, but nothing seem to help. Then, just out of luck I did something that WORKED!
Here's what I did. I noticed that svchost.exe was using a lot of CPU alongside with FF. I ran ProcessExplorer to see what might be connected to this process, the list was long and I didn't have any idea where to start, so what I did was - Right click on svchost process, choose Debug and dismiss the warning. In a few seconds svchost process quit and after that FF started closing properly.
I had to re-enable all my plugins and themes I disabled prior, I also lost my history and preferences which I trashed in the process of searching for solution. But heck, it worked, hopefully for good. Now if someone could point out the real cause of this and fix it for everyone - that would be great. Cheers!

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

I need help. My Firefox will not stop doing this even after i reinstalled. I will shut down firefox and when I open it back up it shows the previous website.

Please Help. This is starting to anger me. I Reinstalled and everything.

You should update your outdated Firefox 13.0.1 version to the current Firefox 17.0.1 release.
I'm not sure what you mean.
Do you mean that Firefox always opens the web pages that were open when you closed Firefox even if you set to open with the home page or a blank page?
Make sure that Firefox closes properly and that there isn't a hanging Firefox or plugin-container process left in the task manager.
*"Hang at exit": http://kb.mozillazine.org/Firefox_hangs
*"Firefox hangs when you quit it": https://support.mozilla.org/kb/Firefox+hangs
Use "Firefox/File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit") to close Firefox if you are currently doing that by clicking the close X on the title bar.
You can check for problems with the sessionstore.js and sessionstore.bak files in the Firefox Profile Folder that store session data.
Delete the sessionstore.js file and possible sessionstore-##.js files with a number and sessionstore.bak in the Firefox Profile Folder.
*Help > Troubleshooting Information > Profile Directory: Open Containing Folder
*http://kb.mozillazine.org/Profile_folder_-_Firefox
Deleting sessionstore.js will cause App Tabs and Tab Groups and open and closed (undo) tabs to get lost, so you will have to create them again (make a note or bookmark them).
*http://kb.mozillazine.org/Multiple_profile_files_created

Firefox will not bring up any webpages after updating to v3.6.7 and then 3.6.8

Everything ran well in v 3.6.6. Today it seemingly upgraded to v3.6.7 and then a Mozilla web page strongly suggested upgrading to v.3.6.8. I did. Sometime after this Norton 360 v3 found some bad files and quarantined them and needed a reboot. After that reboot no web pages would work in FF. I followed the Norton 360 connection thread and that did not help. I also received a new router yesterday, but v3.6.6 worked fine today and IE works now, so I doubt that the router is the reason. Right now I would be happy to revert to 3.6.6 or else uninstall and try from scratch. I have tried a few reboots, but they did not help.
== This happened ==
Every time Firefox opened
== After upgrading from 3.6.6 to 3.6.7 and then 3.6.8 ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)

AppleCare sent me to here:
http://support.apple.com/kb/TS3747
which is, I guess what you are talking about.
We will try it this afternoon, after school is out. However, as I said, our problem is not limited to Firefox.
Hmmm.
Firefox 4.0 and Safari 5.0.4 do not work.
Chrome and Omniweb both work, after 10 or 15 seconds.
Message was edited by: John Cover

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

Firefox will no longer display Unicode symbols after update?

I am using Firefox on Mac OS X Mountain Lion. Just about two Firefox updates ago (roughly Firefox 14), Unicode symbols suddenly stopped displaying that had been displaying fine—switching to boxes with numbers in them.
I have changed my Encoding options to include every single form of Unicode available to me; I am not sure if that has any effect. (Screenshot here: http://puu.sh/QcF6 ) The best part? After doing so, restarting the browser makes the Unicode symbols appear again! No more boxes with numbers! Fixed, right?
''Nope''! When I come back to that page a week later, they are numbers in a box again. In fact, in some cases, the symbol will display temporarily (say, if I had saved it into a blog page), then when I go to edit that blog page, the symbol immediately switches back to box-with-numbers.
This is driving me mad, and was not previously an issue. What can I do to fix this?

Sorry for the late reply, I was waiting for the issue to re-occur. I have cleared and checked for damaged fonts, to no avail; the problem still exists. :(
'''Edit:''' In addition, I've just checked in both Chrome and Safari, and the Unicode symbol that I'm attempting to display are working fine in both of those browsers.

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

Why does firefox randomly close (no crash report appaears after)?

Firefox randomly just closes on me. It's not a crash, at least not a normal crash, because the Crash Report does not come up. It's just one moment it is open and the next it is now.
On top of that when it does do this, and at random other times as well, I am not able to re-open it for several minutes or I have to close the actual process through task manager in order for it to open again.

I'm sorry but I think you didn't get the problem right. Firefox just unexpectedly closes. It does not crash. There are no crash reports.

Just wondering if I'm looking for something that doesn't exist - can firefox automatically close the "print-preview" window after printing?

I'm using the addon in my firefox toolbar to print preview website data then append to a pdf file. Sometimes I am distracted, then can't remember if I've gone through the process and printed/appended the page to the file. It would be helpful if there was a way that the print preview window would close after printing thereby confirming that the process has completed. Thanks in advance.

Thanks for your reply.
I'm running different versions of firefox on different computers. I'm aware of the upgrade procedures. Same issue in later versions as well.
The add-on is called "Print Preview Button 0.5" by sindre-wimberger which I obtained through the "Search Mozilla Support"
However, that's not really relevant - to bring this back to basics the same situation occurs if you do <File> <Print Preview> then print the document. The print preview screen remains until manually closed. Perhaps there is a setting in "about:config"? Does anyone know if this is so? There is an entry "print.whileinprintpreview" but not sure what setting does here. Suspect if set to "False" then you probably wouldn't be able to print from "Print Preview" screen.
Thanks.

Firefox will not complete the installation even after several attempts of rebooting the computer.

I downloaded the Firefox 9.0.1 upgrade but it will not complete the installation on my computer. Everytime I try to remove the program, it tells me to reboot the computer to finish the installation. After several reboots, the same error keeps coming up.

Try to run the Firefox program once as Administrator (right-click firefox.exe: Run as Administrator).
If that doesn't solve the problem then remove the Firefox program folder (C:\Program Files\Mozilla Firefox\) to do a clean reinstall.
Download a fresh Firefox copy and save the file to the desktop.
*Firefox 9.0.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 in the profile folder.
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

Firefox will not automatically load Tiscali and after I have loaded using START it will not access my e-mails on tiscali

Until I loaded the latest version of Firefox I accessed Tiscali without difficulty usong the Icon. Now it will not access the internet at all and I have to use Windows to access the internet. Tiscali then loads but i cannot access my e-mails and I get a message telling me I have 'undefined e-mails'. Windows Explorer works perfectly

Hi again,
Helps if I give the correct link ! <br/>The press shift button appears to still work, but the option to start in safe mode from the programs listing of a standard install I do not think exists anymore.
Safe mode will start from a command line, (or a shortcut) and in some circumstances you may need to enter the full path name on a command or shortcut detailed instructions are at http://kb.mozillazine.org/Safe_mode
Remember (at least at this stage) do not make changes when you get the options list, just click on the continue button.
If you think that RealPlayer is causing the problem you could uninstall that for now.
Firefox recent versions are 3.6 4.0 (and 5.0 in beta). There is some debate as to whether creating new profiles or re-installing Firefox is the simplest method of troubleshooting and solving some of these problems, personally I use multiple profiles and multiple versions of Firefox, and tend to forget the required procedures are less than straightforward. For now at least try [[safe mode]] again.
* see also Instructions for [[installing a previous version of firefox]]

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

After upgrading to 8.0.1 Firefox will download but not install extensions after upgrading to 8.0.1

Windows Vista. Avast Antivirus with Sandbox feature.
Outside Sandbox - all extensions available. Within Sandbox - no extensions available and not able to install any extensions. ie Adblock Plus, No Script etc.
Before upgrading to 8.0.1 no problems in either mode. Add-ons appear to be intact in either mode.
When attempting to install an extension after downloading:
"(extension) could not be installed because Firefox cannot modify the needed file".
Reluctant to delete pluginreg dat file because all extensions are working outside Sandbox.

Hi,
You may have to "trust' the upgraded Firefox, if there is such a setting in Avast and install extensions after starting Firefox outside of the sandbox - normally. Not sure about Avast, but usually a sandbox would mean a virtual area like hard disk storage, registry settings etc. for the sandboxed app and once the application is closed or the computer is shutdown, everything that was done by the app or via the app is sort of vaporized and the application and it's settings are returned to it's previous permanent state.

Firefox will close a minute or so after I go on my gmail

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