Firefox will not connect to internet

All of a sudden tonight I can no longer connect to the internet thru firefox. Pc is about 2 years old, came with McAfee but I've never activated it. Error says 'Unable to connect' and 'Firefox can't establish a connection to the server anywebsite.com'. Any suggestions would be great as I love firefox as my browser!

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 install 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
Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.
*http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
Do a malware check with several malware scanning programs on the Windows computer.
Please scan with all programs because each program detects different malware.
All these programs have free versions.
Make sure that you update each program to get the latest version of their databases before doing a scan.
*Malwarebytes' Anti-Malware: http://www.malwarebytes.org/mbam.php
*AdwCleaner: http://www.bleepingcomputer.com/download/adwcleaner/ http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml
*SuperAntispyware: http://www.superantispyware.com/
*Microsoft Safety Scanner: http://www.microsoft.com/security/scanner/en-us/default.aspx
*Windows Defender: http://windows.microsoft.com/en-us/windows/using-defender
*Spybot Search & Destroy: http://www.safer-networking.org/en/index.html
*Kasperky Free Security Scan: http://www.kaspersky.com/security-scan
You can also do a check for a rootkit infection with TDSSKiller.
*Anti-rootkit utility TDSSKiller: http://support.kaspersky.com/5350?el=88446
See also:
*"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked
*https://support.mozilla.org/kb/troubleshoot-firefox-issues-caused-malware

Similar Messages

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 connect to internet, period; all troubleshooting on my end has been done

Firefox will not connect to any webpage. This is occurring daily and constantly. I have road runner service for internet access. I have done all troubleshooting on my end -- emptying cache, resetting modem, resetting router, etc. I cannot connect to internet. My computer is checked -- Windows troubleshooting, etc. Firefox has also been crashing at least 4-5 times a day on average. Sometimes I have a couple of days free of crashes. Most times, this is becoming infuriating. I have to be on line for work. I have gone through checks and pinging with the internet service through Time Warner Cable. What is going on? It's impossible that every website in the world has a broken server!!!

So you also rebooted your router correct? Does the iPod still connect okay to other networks?
B-rock

After updating to Firefox 3.6.15, Firefox will not connect to the Internet, even after uninstalling and re-installing Firefox in my Windows XP environment.

After downloading the Firefox 3.6.15 update, my problems began. Firefox would not connect to the Internet. When I rebooted my PC, Firefox said that it couldn't access any Web sites. I uninstalled Firefox, then downloaded and installed Firefox 3.6.15. I still have the same problem: Firefox will not connect to the Internet. I am running Windows XP, service pack 3. I never had problems with Firefox until I installed version 3.6.15.

I have XP Pro. I tried installing 3.6.15 and could not open it. I did a system restore and 3.6.14 would no longer open. I tried again installing 3.6.15 and got a message that the previous version had not uninstalled properly. Tried uninstalling.
As a precaution I used MozBackup to save my bookmarks etc. and also saved a system restore point.
I then clicked Start, My Computer, drive C, Program Files and deleted the Firefox folder.
I installed 3.6.15 and it is now working fine with all my bookmarks and addons loaded automatically.

UPDATE FIREFOX , DOWNLOADS BUT WILL NOT CONNECT TO INTERNET, OLD ONE DOES. WORKING ON MAC WITH LEPOARD

I downloaded the updated Firefox 4 on my macbook pro. I am currently using Firefox 3.5 with no problem. With the new download the firefox will not connect to the internet. Help please?

Hello!
Welcome to Apple Discussions:
What IP address is your Powerbook getting from the AE?

When wireless connection lost during surfing, firefox will not access the internet after connection is restored.

While surfing the net on my laptop (windows vista home premium, all updates current), if the wireless internet connection is lost while a page is loading, firefox will NOT connect to any websites at all when the connection is restored. Also, if I try to shut down firefox, it will appear to close, but if I try to re-start it again, it will tell me "firefox is already running", even though it's not. I try to go to windows file manager and shut down firefox.exe manually, but even with that it will not shut down, it's like it's stuck in some sort of "loop". The only way to recocile it is to completely re-boot the system, which takes forever, because firefox.exe doesn't want to shut down even in re-boot.
== This happened ==
Every time Firefox opened
== Always with firefox. And firefox is up to date ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C)

No it does not work, uninstalled both McAfee and Firefox and only reinstalled Firefox alone, still did not work. I have now both reinstalled and am still unable to connect

Beginning last week, Firefox will not connect to the internet.

Firefox will not access the internet at all. This began suddenly and not immediately following a change in Firefox or my computer.

Maybe you have a malware infection.
See:
*[[/forums/contributors/707453]]
Do a malware check with some malware scanning programs. 
You need to scan with all programs because each program detects different malware. 
Make sure that you update each program to get the latest version of their databases before doing a scan. 
 
* http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
* http://www.superantispyware.com/ - SuperAntispyware
* http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
* http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
* http://www.lavasoft.com/products/ad_aware_free.php - Ad-Aware Free
See also:
* "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

Firefox will not connect to serever.

Firefox will not connect to server. Other application connect.
I have removed and reloaded firefox several times.

Which security software (firewall, anti-virus) do you have?
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.com/kb/Server+not+found
* https://support.mozilla.com/kb/Firewalls

Firefox will not connect to any site since downloading new upgrade.

Firefox will not connect to any websites since installing the latest upgrade. Google Chrome and Internet do work.

Some problems occurs when your Internet security program was set to trust the
previous version of Firefox, but no longer recognizes your updated version as
trusted. Now how to fix the problem: To allow Firefox to connect to the Internet
again;
* Make sure your Internet security software is up-to-date (i.e. you are running the latest version)
* Remove Firefox from your program's list of trusted or recognized programs, then add it back. For detailed instructions, see
'''[https://support.mozilla.org/en-US/kb/configure-firewalls-so-firefox-can-access-internet?esab=a&s=Configure+firewalls+&r=0&as=s Configure firewalls so that Firefox can access the Internet.]''' {web link}

Firefox will not connect to certain major `websites" Why? I can go to Google and access

In the last 4 days Firefox will not connect/find certain major websites. Basically says that server not found.
What's the deal here? I use windows 7 and have the most current
firefox update.

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.com/kb/Server+not+found
*https://support.mozilla.com/kb/Firewalls
*http://kb.mozillazine.org/Error_loading_websites
*https://support.mozilla.com/kb/Error+loading+web+sites

4 Beta will not connect to internet on any of my PC's

For humor, 4 Beta has made Firefox unusable on my 64 bit XP-pro machine and my 32 bit XP Atom processor machine. I must write this on MS Explorer...
PROBLERM: Installed on two machines. Will not connect to internet.
WARNINGS: "This Operation cannot be completed. A secrue network communication has not been cleaned up correctly. "
OPERATION: Starts up, checks for settings, will not connect to internet as evidenced by 1> no website is displayed, and 2>

When I try and open it, windows puts up a box saying that windows 7 has a problem with Safari and will not open?
Fingers crossed, your Windows 7 will have been recording some additional information about those.
First, open your Action Center and expand "Maintenance". Click "View reliability history":
Once the reliability report has been generated, look for Critical events for Safari generated at the time of the "Safari has stopped working" messages. Doubleclick the name Safari in the critical events. (Don't click View solution.) Here's a screenshot showing what to doubleclick:
You should see something that looks like the following screenshot:
Copy and paste the contents of the problem report into a reply here. For example:
Description
Faulting Application Path: C:\Program Files (x86)\Safari\Safari.exe
Problem signature
Problem Event Name: BEX
Application Name: Safari.exe
Application Version: 5.34.55.3
Application Timestamp: 4f6ba239
Fault Module Name: StackHash_7100
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 7d3a1240
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 2057
Additional Information 1: 7100
Additional Information 2: 710027e7a8d30022e5e0ee529f40121f
Additional Information 3: 5158
Additional Information 4: 5158ee4164428f7b514a5e7ee9654f7c
Extra information about the problem
Bucket ID: 2871481836

OS Windows Vista Ultimate - HP LAser Jet 1000 - Firefox will not print out internet page etc...

OS Windows Vista Ultimate - HP Laser Jet 1000 - Firefox will not print out internet page etc...
That simple, find an page you want to print, hit the print button and zero zip zlich.
Works just fine with IE?????

See this: 
http://kb.mozillazine.org/Problems_printing_web_pages

All of a sudden my iTunes 10.1.1.4 will not connect to internet radio

Hi all,
All of a sudden yesterday, my iTunes 10.1.1.4 will not connect to internet radio. It has otherwise been working fine for almost two years.
My internet connection is working fine for web browsing and email.
I ran the iTunes diagnositcs and it showed me how to go in to the Windows Firewall settings to check to see if there was a connection... there was already one for iTunes in the list of accepted connections. Just to be sure, I created a new iTunes connection exception and it didn't help.
The iTunes diagnostics test shows all information as being normal except this info, pasted in below, about the Firewall test...
Firewall Information
Windows Firewall is on.
iTunes is NOT enabled in Windows Firewall.
Connection attempt to Apple web site was successful.
Connection attempt to browsing iTunes Store was successful.
Connection attempt to purchasing from iTunes Store was successful.
Connection attempt to iPhone activation server was successful.
Connection attempt to firmware update server was unsuccessful.
The network connection timed out.
But this information is partially incorrect, according to the Windows Firewall settings themselves. My Windows Firewall settings show that iTunes is indeed enabled in Windows Firewall.
I can access the iTunes store, but there doesn't seem to be any test in the iTunes diagnostics that makes it test to see if it is connecting to the iTunes internet radio server.
Is there possibley a current problem happening with the iTunes internet radio connection?
Thanks for any suggestions.
numetro

Hi movem,
Are you saying that Apple has changed the URL for every internet radio station in the entire iTunes radio station library?... or are you suggesting that just some of the internet radio stations in my playlist changed their own URLs?
It seems unlikely that it happens to be that every single internet radio station in my playlist of a hundred radio stations all happened to change thier URLs at the same time, since all of the stations in my playlist will not play from that playlist.
When I went through and found some of the radio stations in the giant default internet radio station library in iTunes, I found some of my old ones that were in my playlist and they play fine and they can be put in to a new playlist and they play fine there too, but the very same stations still will not play from my old original playlist.
So it makes sense if you are saying that Apple has somehow changes all the URLs for all the radio stations in iTunes, because that make sense since they all play from the main radio library.
But, otherwise, to say that all the radio stations in my playlist happened to change their own URLs at the same time, that would be a bit far fetched.
Did you get some news from Apple that this happened, one way or the other?
PS: I'm having a hard time finding a few of the stations that were in my previous, original playlist as well... some of them have either disappeared, changed categories, gone off the air or changed their names.
Thanks,
numetro

Firefox will not access the internet. I have used Firefox for years and the past week I have not been able to get on the internet??? What is the problem. My interent works as I get email and can iuse Internet Explorer to access.

Firefox will not access the internet. I have used Firefox for years and the past week I have not been able to get on the internet??? What is the problem. My interent works as I get email and can iuse Internet Explorer to access

Which version of Firefox are you using?
See
* https://support.mozilla.com/en-US/kb/Firefox%20cannot%20load%20websites%20but%20other%20programs%20can

MBP upgraded to Yosemite and now will not connect to Internet using a Cisco router

I Upgraded my MBP mid 2010 to Yosemite and now it will not connect to Internet using a system that involves typing in my user name and password in an auto pop up window provided by Cisco security systems. Before, using Mavericks, it worked perfectly: boot up MBP and the Cisco pop up auto loaded. Typed it my password and hey presto, connected to Internet. Now, zilch. There is nothing wrong with the Cisco cos my iPad connects ok, as do both my iPhone's.
the problem is with Yosemite therefore. Please help. I tried all the usual diags, etc to no avail.
Message was edited by: AWAC

Sounds like there could be some kind of compatibility issue between ICS and this Bluetooth device of yours. Is there any compatibility info from the manufacturer about which Android versions that's being supported?
- Community Manager Sony Xperia Support Forum
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Firefox will not connect to internet

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