Firefox will not open. I have used it for two years.

For 2 years, until yesterday, Firefox worked well. I opened it, using the "Internet" button on the keyboard, or from the start menu. Now, nothing responds. Yesterday, when Mozilla was running, the top part of the screen display disappeared. The "search" message filled the whole screen. I tried clicking on Mozilla in the Start tableau, and the "All Programs" tableau. Nothing. According to the Control Panel, Mozilla, all 26.97 megabytes, is still there.

For some things you can try see [[Firefox will not start]].
I would start by seeing if a new profile works. See [http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows creating a new Firefox profile on Windows - MozillaZine Knowledge Base]
If the new profile does work, you can transfer selected data such as bookmarks and passwords to the new profile. I would not copy preferences or extensions, instead re-install the extensions. See [http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox Transferring data to a new profile - Firefox - MozillaZine Knowledge Base]

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We have iPhone 4 and I plugged phone into after market hardwired plug in car (that we have used successfully for two years) and the screens has gone black and wont turn on. Phone is charged. We have tried force quit- home screen and top button. help pls

We have iPhone 4 and I plugged phone into after market hardwired plug in car (that we have used successfully for two years). The screen has gone black and wont turn on. Phone was charged. I have tried force quit- home screen and top button. iTunes is not recognizing phone when I plug into computer. help pls

FIRST charge with an Apple charger for at least 15 minutes. Then hold the HOME and SLEEP buttons at the same time until an Apple logo appears. Hold for up to 30 seconds. If nothing happens the phone hardware has failed.

Firefox will not open after i use it 3 or 4 times i have to update to make it work ?

Using XP pro after a couple years firefox quit working. will not open, went to support tried everything including a clean install. after which it worked for a short while then won't open. click on icon nothing happens. downloaded 18.0 update and installed worked a few times then quit. created new profile but when i click on firefox does not do any thing. if i run the update installer it will work for a while then quit to make it work again i have to update again ant it will work mabey for 1/2 to 1 day. after i update when firefox opens then it will give me the profile box. after it quits it will not load the profile box until i update again.

Which security software (firewall, anti-virus) do you have?
Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.
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; i have a MacBook, osx version 10.8.2

<blockquote>Locking duplicate thread. 
Please continue here: [[/questions/945539]]</blockquote>
When I try to launch firefox, it is not opening at all; at one point the firefox icon appeared at the top of the screen as if it was opening but it did not open

Try to repair the disk permissions:
*http://thexlab.com/faqs/repairprocess.html
Try to remove the Firefox plist file (org.mozilla.firefox.plist).
*http://www.macfixit.com/article.php?story=20060606082246983 How .plist files become corrupt and troubleshooting the results
Go to "~/Library/Preferences" and remove the plist file for Firefox (org.mozilla.firefox.plist)
Try to start Firefox in Safe mode:
*On Mac, hold down the Options key while starting Firefox
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Firefox will not open; i have a MacBook, osx version 10.8.2; this is new since 12-28-12

when i click on firefox, it does not open; one time I saw it appear in the top part of the screen as if it was going to open but now it is not recognized at all; it was last updated 10-12.

Try to repair the disk permissions:
*http://thexlab.com/faqs/repairprocess.html
Try to remove the Firefox plist file (org.mozilla.firefox.plist).
*http://www.macfixit.com/article.php?story=20060606082246983 How .plist files become corrupt and troubleshooting the results
Go to "~/Library/Preferences" and remove the plist file for Firefox (org.mozilla.firefox.plist)
Try to start Firefox in Safe mode:
*On Mac, hold down the Options key while starting Firefox
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Firefox will not open - I have reinstalled and used the profile manager solution. It was fine earlier today. IE working fine.

I tried the suggested solutions including the 'clean install', any help would be most appreciated. I've used the Profile Manager, which is not much use when the browser won't even open to test it. I've also reinstalled twice, installed updates and restarted numerous times.
Firefox does do this on occasion, but usually sorts itself out - not this time.
Help!

You should check for malware or go back into regular mode and see if temorarily disabling your antivirus helps.
You can try these free programs to scan for malware, which work with your existing antivirus software:
'''Scan with all.'''
* [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]
Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article.

I installed 4.0 and now firefox will not open, though it is running, I have uninstalled and re-installed and it still will not open?

I installed 4.0 and now firefox will not open, though it is running, I have uninstalled and re-installed and it still will not open. Not sure why this is happening

If you use ZoneAlarm Extreme Security then try to disable Virtualization.
*http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
See also:
*[[/questions/880050]]

I have no navigation bar and firefox will not open in safe mode to reset to default config. Reinstalling doesn't work. Any help please.

I have no navigation bar ever since I closed it to gain more space on the screen. It won't re-open. Firefox will not open in safe mode, but opens immediately in normal mode with the new improper config, so I cannot reset to default config. I erased Firefox and re-installed and it still opens with the same faulty config. Why does Firefox not give me the safe mode dialog box, why can I not re-open the nav bar, and how can I do these two things, please? Firefox is currently unusable for me without a nav bar and without access to the default settings in safe mode. I cannot research the extensions I'm running since I have no nav bar to go to Tools, Add-ons, Extensions.
== This happened ==
Every time Firefox opened
== I closed the navigation bar to gain more space on the screen and I couldn't re-open it. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB6.4; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)

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.

I downloaded Firefox 5.0. Firefox will not open. States running offline. I have a Intel Pentium/Windows XP system.

I downloaded Firefox 5.0. Firefox will not open. States running offline. I have a Intel Pentium/Windows XP system.
This also happened when I tried to download Firefox 4.
Firefox 3.6.18 works fine

You may need to delete the Firefox program folder before (re)installing the latest Firefox. 
In case you still have problems after installing then check your security software.
A possible cause is security software (firewall) 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 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
*http://kb.mozillazine.org/Browser_will_not_start_up

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, a pop up window message says: The application or dll mozilla firefox xul.dll is not a valid windows image. I am using XP and firefox use to work perfectly

Firefox will not open a pop up window says "the application or dll c:program files mozilla firefox xul. dll is not a valid windows range"
== This happened ==
Every time Firefox opened
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB0.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)

I resolved the problem. I went to CNet and re-downloaded the upgrade. It proceeded as intended and the upgrade is installed and running with no loss of plug-ins, bookmarks, etc.

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. Hangs at "connecting" stage. Non-responsive even to process shut-down via task manager.

Starting yesterday, Firefox will not open at all. It hangs at the "connecting stage." For hours. It will not shut down even using the task manager for applications or processes, and it locks up virtually every other application. I thought I managed to save an open Word document yesterday - it looked like a slow, but normal save during the Firefox hang, but the document was empty when I restarted my computer.
Even though my machine is not pentium 4 based, I tried starting using the Windows XP/M configuration, I downloaded and re-installed (over the top of) the existing version, I verified that no Mozilla processes were running before trying to start Mozilla, and tried creating a new profile. Absolutely no success. Every time (of the dozens) I have tried to start Firefox I have had to force a hard shut-down to get out of the application. I have now unpinned Firefox from my task bar because I keep forgetting and hitting it by reflex.
I am running version 11.0 (at least that is what I just downloaded - I am not positive what I was running yesterday). My system is Windows 7 Home Premium, Intel Core i3, 2.4 gHz, 4 GB RAM, 64 bit OS.
Next option is to restore to a previous version. If that doesn't work, I will uninstall and start over from scratch.

A possible cause is security software (firewall) 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
*http://kb.mozillazine.org/Browser_will_not_start_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.

Firefox will not open. I have used it for two years.

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