Firefox will not open but only presents tab at bottom of page

Recently an application called Alot appeared and forced itself into my firefox browser. It appeared as a new search engine under firefox, but shortly problems occurred.

For details of how to fix this see this site - http://kb.mozillazine.org/Profile_in_use

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Firefox will not open it just shows a black ms dos page- how can i save my bookmarks?

firefox will not open it just shows a black ms dos page- how can i save my bookmarks?

See here for Bookmark Backup
*http://kb.mozillazine.org/Backing_up_and_restoring_bookmarks_-_Firefox
Profiles - Where Firefox stores your bookmarks, passwords and other user data
Profile Backup
*http://kb.mozillazine.org/Profile_backup
*https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
*https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data

I installed Spyware Doctor with antivirus and Firefox will not open but goes into Not Responding mode

After installing PC Tools spyware doctor with antivirus Firefox will not launch. I get a black screen with a not reponding message at the the top. I have tried an earlier version of Firefox (5) and this launch OK until I closed it and then it too refused to launch.

Hit the '''Alt''' key to show the Menu bar, then open View > Toolbars and select Menu bar and Navigation bar, so they have a check-mark.

Firefox will not open but process runs

Suddenly I can't get Firefox to open - process runs in task manager but no window comes up at all. Have been using it on this system for a long time with no issues. It isn't the process already running issue which most of us know.
Have tried uninstalling and reinstalling Firefox to no avail. I have no other monitor connected and desktop is not extended to an imaginary monitor where it may be opening. Running on Windows Vista.
The problem started when Firefox hung / crash / froze trying to run a video applet on a website (bbc.co.uk).
Is this an issue with any kind of known resolution or must I find a new browser after years being comfortable with Firefox?

I have exactly the same problem with both Firefox and Thunderbird, under my Windows Vista OS. However, I can get both running using the following cumbersome method. In the Task Manager right click the entry firefox.exe in the process window. Choose "Properties" from the drop-down list and then choose the "Previous Versions" tab. In my case it showed a so-called "shadow copy" dated about four weeks previously and when I selected this and clicked "Open" then Firefox opened normally, though rather slowly. Unfortunately this does not solve the problem because after Firefox is closed the same problem recurs next time I try to open it. However, if the "Restore" button is available (it was not for me) in the "Previous Versions" window then you might be able to restore an older but working copy. You can also get to the "previous versions" window by right clicking the firefox.exe file in the installation folder (usually C:\Program Files\Mozilla Firefox\ ).
This is a really unfortunate development in Firefox and Thunderbird that will force people to abandon them and move to equivalent Microsoft products that do not have these problems. Mozilla developers please act on this problem urgently.

Firefox will not open but when i go t uninstall firefox to reload it says i must close firefox????

Hi operating windows 7 starter pack on a samsung n150 netbook had no trouble until yesterday when trying to open firefox.

http://kb.mozillazine.org/Kill_application

I had a pop-up from Mcafee yesterday with option to block a particular access request, today Firefox will not open but shows the message with "try again" -please help.

I assume that I inadvertantly authorized McAfee to block Firefox .
How to unblock ?
thanks for helping.

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.
You can try these free programs to scan for malware, which work with your existing antivirus software:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility]
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article.
Did this fix your problems? Please report back to us!

Firefox will not open. Unable to uninstall because message says Firefox is running. How do I turn it off?

I upgraded Firefox after upgrading to windows 8.1 now firefox will not open but when I try to uninstall the program I get a popup telling me to close firefox. The task manager says nothing is running. Help.

Try restart your computer then try unistall, then get the most recent version here:
*[http://www.mozilla.org/en-US/firefox/all/ Last Firefox]
*[https://support.mozilla.org/en-US/kb/install-firefox-windows Install Firefox]
Also:
*[https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer Uninstall Firefox]

Firefox will not open new 'tabs', not sure if its disabled, but does anyone know how to enable the use of my tabs?

Firefox will not open any tabs on my browser. I've tried using all alternatives to open a new tab - using the 'plus' (+) button doesn't work, 'control + T' doesn't work, going to File and clicking 'new tab' doesn't work either? Help please!

Your suggestion worked! Thanks!

Firefox will not open on my laptop computer,It is my designated server but will not open???? Any ides why?

Firefox will not open on my lap top

No, nothing at all happens. Once clicked the 'circle' that suggest it is loading appears (if that makes sense) but no, nothing
Many thanks.
Can you check something for me please?
Restart your PC. after the PC restarts, bring up your Task manager, and go to the "Processes" tab. Click "Image name" to sort the processes alphabetically.
Now try to launch iTunes.
Does an itunes.exe process appear? If so, does it vanish after a second or so, or does it persist in the Processes tab (even though iTunes itself never shows up)?

Since updating last time Firefox will not open new tabs unless I right click on a link. It won't open them via file or the tab at the top of the brwoser. Anyone know how to fix this?

Since updating last time Firefox will not open new tabs unless I right click on a link. It won't open them via file or the tab at the top of the brwoser or usinf ctrl + t. Anyone know how to fix this?

I can press ctrl for a new tab but otherwise a new tab does not open. I actually need help regarding this new Synch which apparently will be in Firefox automatically in an upcoming version so I am asking how that will synch with people who use LastPass-of course because I use this very successfully and really am not eager to change the set up that I have in place at this time.
I have read through endless FAQ trying to find anyone else who has this question or concern but have found nothing. Can you please tell me how that service will get along with LastPass which does basically the same thing as Synch-it is probably spelled wrong as it looks wrong to me but if I click back to where this issue began, I will lose all of this question so please respond for the upcoming service synch.

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 on my computer the majority of the time. If I shut down and restart it will work sometimes, but not always. This started recently in the last two weeks. Today is June 12th 2011.

Firefox will not open on my computer the majority of the time. If I shut down and restart it will work sometimes, but not always. This started recently in the last two weeks. Today is June 12th 2011.

See:
* http://kb.mozillazine.org/Browser_will_not_start_up

Firefox will not open at all. I only get the Mozilla Crash Reporter over and over.

After updating yesterday, Firefox will not open. I repeatedly get the Mozilla Crash Reporter. I've scanned my computer for malware, I've tried to open it in safe mode (it won't), I've completely uninstalled and reinstalled Mozilla, but nothing works. Each time I reinstall, I still get the Mozilla Crash Reporter. The program will not open at all.
I ran my crash ID. Here is the info: bp-eff196eb-ed21-45ee-83c6-e0fc42130123

hello, this crash is caused by Websense Endpoint security software that is running on the system. please try to install all the updates for this program that are available...

Firefox is not open, will not open, but when I try to update or uninstall it says I need to close Firefox first. I have exhausted the suggestions on the support page. I have no choice but to use a different browser.

Firefox is not open, will not open, but when I try to update or uninstall it says I need to close Firefox first. This is a common problem, as I have seen many posts with the same problem. I don't know what else I can say about it, it is pretty straightforward.

http://kb.mozillazine.org/Kill_application

Firefox will not open at all. I tried to remove it from the programs to try to reinstall it but it wont let me remove it. So I tried to download again anyways and ff still wont open. My email is alicia@*****

Firefox will not open at all. I tried to remove it from the programs to try to reinstall it but it wont let me remove it. So I tried to download again anyways and ff still wont open. My email is alicia@****

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 but only presents tab at bottom of page

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