Firefox will not open a browsing window, program opens, no window (4.0b5, Mac)

just started happening - i open firefox, menu up top opens but no window . . . tried opening new window, new tab, no dice

I also have this problem. I cannot open links from a discussion board I frequent nor can I open links from my email. Also after opening my email, I cannot go to any other sites except my home page. I can then go no where else.
When I close Firefox and try to reopen it, it does nothing! I have to bring up the Task Manager and end the Firefox process before I can get back in.
To the best of my knowledge, this problem started with the new update to Ver. 3.6.9. I am running Windows XP Media Center 2005

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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 save my Connections settings, so opens on manual proxy every time, rather than No Proxy?

I'm using Firefox 4.01 and it will not save my connections settings when I set them to "No Proxy" keeps defaulting to manual therefore it wont load any pages until I change it to "No Proxy" which I have to do every time I open firefox.

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

Firefox will not load webpages and has trouble quiting

Recently, firefox has randomly stopped being able to load pages as if the wireless was not work (redirected to the cannot find server page). I would think this was a problem with the internet, but when I restart my wireless it is not fixed and my other browsers do not see the same issue. When I restart firefox it works again, but I usually have to do this several times a day. Another issue, firefox will not quit when I do command Q. The window will close but the application will not quit, and I have to go and force quit it. Background info, using Macbook, wireless internet, firefox is up to date. Thanks for your help.

Hello!
Please provide the following information to better assist you: 
*Firefox version
*Operating system

Windows 7 ffox 1.6.16 installed office 2010 intimated cannot open link outlook firefox default browser, firefox will not initiate at all. Have to restart to get any response from firefox which then works but it crashes again. No error message

Windows 7, firefox 1.6.16 just installed office 2010, sometimes cannot open a link in outlook and firefox is my default browser, and firefox will not initiate at all. Have to restart computer to get any response which then works but after a while it crashes again. Was this due to an update or office 2010 has a hidden setting somewhere? Why would firefox crash without any message? Intimated consuming

I have had a similar problem with my system. I just recently (within a week of this post) built a brand new desktop. I installed Windows 7 64-bit Home and had a clean install, no problems. Using IE downloaded an anti-virus program, and then, because it was the latest version, downloaded and installed Firefox 4.0. As I began to search the internet for other programs to install after about maybe 10-15 minutes my computer crashes. Blank screen (yet monitor was still receiving a signal from computer) and completely frozen (couldn't even change the caps and num lock on keyboard). I thought I perhaps forgot to reboot after an update so I did a manual reboot and it started up fine.
When ever I got on the internet (still using firefox) it would crash after anywhere between 5-15 minutes. Since I've had good experience with FF in the past I thought it must be either the drivers or a hardware problem. So in-between crashes I updated all the drivers. Still had the same problem. Took the computer to a friend who knows more about computers than I do, made sure all the drivers were updated, same problem. We thought that it might be a hardware problem (bad video card, chipset, overheating issues, etc.), but after my friend played around with my computer for a day he found that when he didn't start FF at all it worked fine, even after watching a movie, or going through a playlist on Youtube.
At the time of this posting I'm going to try to uninstall FF 4.0 and download and install FF 3.6.16 which is currently on my laptop and works like a dream. Hopefully that will do the trick, because I love using FF and would hate to have to switch to another browser. Hopefully Mozilla will work out the kinks with FF 4 so I can continue to use it.
I apologize for the lengthy post. Any feedback would be appreciated, but is not necessary. I will try and post back after I try FF 3.16.6.

When I am NOT private browsing Firefox will not allow me to delete or change the website address in the location bar. My only remedy is to open a new window and search in google then click the link to that site through google. How can I resolve this?

Question
When I am NOT private browsing Firefox will not allow me to delete or change the website address in the location bar. My only remedy is to open a new window and search in google then click the link to that site through google. When I swap to private browsing firefox allows me to anter the website address directly into the location bar - but this is a slow [prcess to swap back and forth - also by dint of using private browsing I loose my website information.

Start Firefox in [[Safe Mode]] to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Firefox will not open at all, no message , nothing. The other browser (internet explorer) opens fine. Do I delete the old program and reinstall it? It works fine on the other two accounts on this computer.

no other details, I click on foxfire, the hourglass figure
appears for a few seconds then goes off and nothing else happens.

Try the procedures in the [[Firefox will not start]] article.

Firefox will not open at all. Google Chrome main browser.

Google Chrome my main web browser with Comcast as home page.
Now Firefox will not open at all. What do I do. Delete Firefox and reinstall is what I think?

Yes, i would try reinstalling Firefox first.
A few other basic trouble shooting things you can try is this:
Run all Windows Updates, install all needed service packs, etc.
Update your graphics driver (Firefox uses your graphics card for some rendering, and an out of date graphics card driver can cause problems. [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]
Update all your plugins (Flash, Java, etc.): [http://www.mozilla.org/plugincheck/ http://www.mozilla.org/plugincheck/].
Download and Install MalwareBytes Anti-Malware, run a full Scan. [http://www.malwarebytes.org/ http://www.malwarebytes.org/]. This helps check that there are no viruses on your computer causing issues. You can uninstall this program after you clean off any infections.

Used Firefox almost exclusively, then it stopped working. I reinstalled, find the program in Programs, but it will not load. How do I fix in Windows XP?

Firefox will not start. It had been my default browser. I downloaded and reinstalled program running Windows XP. When I click on icon on desktop, or attempt to run from Programs, nothing happens.
Permissions did not change in the McAfee security software
This is what shows in Properties:
C:\Program Files\Mozilla Firefox
File version: 1.9.2.3989
File size: 890 KB (912,344 bytes)
Coincidentally, Windows Messenger now attempt to start every time I try to open an Internet Browser

The [[Firefox will not start]] article may help.
You can try creating a new profile to see if the problem is with your current profile (the profile is where Firefox stores user data). For details on doing that 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 copy selected data from the old profile, as shown in the "Suggested profile contents to transfer" section of the [http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox Transferring data to a new profile] article.

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

I switched on my PC and there was an update for realplayer. Since then firefox will not load. It is running according to Task Manager. I've downloaded a another copy of the programme using IE but whilst it loaded as a programme, does not open a window.

I switched on my PC and there was an update for realplayer. Since then firefox will not open as a window. It is running according to Task Manager. I've downloaded a another copy of the programme using IE but whilst it loaded as a programme, does not open a window.

Hi again,
Helps if I give the correct link ! 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]]

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,tried running profile manager but I receive a small window with the word :dialog" in it.

Firefox will not open.Tried uninstalling and reinstalling program without any success.
Tried running profile manager,but a small screen shows up with the word "dialod" in it.
Any assistance appreciated.
== 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; InfoPath.2; .NET4.0C; Tablet PC 2.0)

Can you provide us a screenshot?
Vista/7
Go to Start and type in Snipping Tool then provide a screenshot ,save it, and upload it to any of these file uploading websites.
[http://www.imageshack.us ImageShack]
[www.mediafire.com MediaFire]
[www.kimag.es Kimages]
XP
Press '''FN + PRT SC''' on your keyboard to take a screenshot and Press '''CTRL + V''' in Paint to paste it and save it and upload it.

Firefox will not load wanted/allowed pop up windows, a new window will open, but nothing loads.

Firefox will not properly load wanted pop up windows from allowed site. It will allow the pop up to open, however nothing loads, it is just a blank window. I have not always had this problem and have not changed any settings to cause this. After the problem started I upgraded to version 3.6.7, cleared all recent history, and turned off pop up blockers. No change.
== This happened ==
Every time Firefox opened
== About a week ago

THESoLUTION is here :-) right...
1. you must go to control panel>programs>un-install programs
2. find any versions of java and un-install them (in my case i had something called 'kiwee'.
3. un install and voila!
This solved my problem anyway , apologies if this is not your issue

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.

Since upgrading from Windows Vista to Windows 7 both Internet Explorer and Firefox will not recognize the numbers keys of my keyboard. I get numbers in Word and every other situation, just not in the internet programs.

Since upgrading from Windows Vista to Windows 7 both Internet Explorer and Firefox will not recognize the numbers keys of my keyboard. I get numbers in Word and every other situation, just not in the internet programs. I have tried uninstalling Firefox and reinstalling with no results.

If there are problems with importing the IE Favorites in Firefox then export the favorites in IE to an HTML file and import that file in the Firefox Bookmarks Manager.
If you do not have the menu bar in IE then right-click the toolbar at the top to enable the Menu Bar.
*Export the favorites in IE to an HTML file (bookmarks.html): File > Import and Export
*Import the HTML file in Firefox: Bookmarks > Show All Bookmarks > Import & Backup > Import Bookmarks from HTML
See "Import from another browser" and "Import from file":
*http://kb.mozillazine.org/Import_bookmarks

Firefox will not open a browsing window, program opens, no window (4.0b5, Mac)

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