Firefox won't connect to the internet after trying all the troubleshooting, reinstalling, checking my firewall, etc. Help!

OK, I've got Firefox re-installed but it still can't connect to the internet. The original issue disabled my Norton antivirus and I'm currently using Windows defender. I've removed Mozilla from the allow list as suggested in the troubleshooting and then re-added it, but that didn't help, Any suggestions? I'm running a full virus scan now, it's been 2.5 hours now and still running. I can't figure out what is stopping FF from accessing internet and so far none of the suggestions have worked. I'm running windows 8. I'm trying to install the troubleshooting info but it keeps asking me what to open the xpi file with and I have no idea. dammit this is so annoying. Ok, got the troubleshooting info added manually. Hope that helps someone help me.

Thanks, that didn't work either. I finally got it figured out with some help from a co worker. My norton antivirus was blocking the upgrade,even though the upgrade had disabled it. Weird, but once we updated and downloaded the new norton things worked fine. Thanks everyone for the suggestions.

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After updating, Firefox won't connect to the internet. All websites timeout. Internet explorer works fine.

I started up my computer and opened up firefox. A box popped up that said firefox was updating. After updating was complete, firefox attempted to connect to my homepage, yahoo, but the connection timed out. I tried connecting to other websites and they also timed out. My internet connection is good because internet explorer works fine.

Common cause after upgrading/updating is that your security software (firewall) may not recognize the new version and may be blocking Firefox and/or plugin-container. Remove all permissions for Firefox and plugin-container from your firewall's programs permissions list, then start Firefox and go to any website and let it detect and set internet access permissions.
*See [https://support.mozilla.com/en-US/kb/Cannot%20connect%20after%20upgrading%20Firefox Cannot connect after upgrading Firefox]
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Firefox won't connect to the internet

hello,
i'm currently working on a Windows7 computer. Firefox used to work perfectly well here, then one day it unexpectedly crashed, and it hasnt been able to connect to the internet since.
I've already tried everything in the troubleshooting part of this website, but nothing seems to help. I couldnt find the profile manager to create a new profile for firefox though.
even though the connection error message opens whenever i use firefox to connect, internet explorer works perfectly fine with the internet.
also, i think this problem came right after IE was opened for the first time on this computer. Any help would be really appreciated.
Thanks,
Sarvin

Also I tried starting in safe mode and restarting the router to no avail.

Firefox won't connect to the internet, but I.E. will and does, Why???

Firefox resently asked me to update it & after i went to your site i did. now I cant connect to the internet with firefox. But i can connect with Internet Explorer. Can you help me???

Firefox cannot load websites but other programs can
* https://support.mozilla.com/en-US/kb/Firefox%20cannot%20load%20websites%20but%20other%20programs%20can
Check and tell if its working.
Also, Remove Multiple (older) Java Console extensions
* http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions

HT201263 My iPhone 4 is stuck on the "Connect to iTunes screen" after trying to update to iOS 7.0.4! Help!

I was attempting to update my iPhone 4 to the new iOS 7.0.4 via my computer after I plugged it in to create a backup copy and something went wrong before it could finish and I recieved an error message. Now my phone is stuck on the "Connect to iTunes screen". I've tried everything to reset & restore my phone with no luck!
I have:
-Restarted my computer
-Updated iTunes to most current version
-Turned phone on and off several times, waiting up to a half hour before turning on (to be greeted directly with apple logo then the connect to iTunes screen)
-Turned on, turned on and held home button (nothing happens)
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I tried calling my phone from the other phone and it goes straight to voicemail. I am super frustrated! Does anybody know what is going on?

I was able to restore my phone!!!
I called Apple and they said there was nothing more I could do. I called my carrier Verizon and was able to get my computer to recognize my device after trying this-
Solution:
After trying EVERYTHING this is the ONLY thing that worked-
I took the USB connector cable out of the USB port it was in, and tried another one on the otherside of my laptop and iTunes was able to discover my phone in recovery mode. My phone was reset and everything is fine ( thank gosh for backup copies!)

Firefox won't connect to the internet even though internet explorer does.

Everytime firefox is open it reads "unable to connect" I've already tried disabling the firewalls and allowing firefox to run, but no bueno. The computer is an Emachine and there are similar problems with other programs such as aol and party poker.net. Basicly, you can download the programs but they don't run. How do you allow these programs to open up?
== This happened ==
Every time Firefox opened
== I downloaded it! ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; GTB6.3; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)

Please try all suggestions from this article: [[Firefox cannot load websites but other programs can]].
What security software do you have enabled (firewalls, anti-virus software, etc.)? Try following the instructions in [[Firewalls]] closely, since it's not always obvious how to disable the firewall/other security software completely or persuade it to browse the web.

My iPod classic (160gb) won't connect to iTunes I've tried all the updates (using an 07 MacBook I believe) and it keeps saying it needs snow leapord

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HI there,
Snow Leopard is going to be a paid update that you will need to order form the Apple Online Store. Before upgrading, it is always a good idea to have a backup of your information. The article below has more information about backing up.
Mac OS X v10.5, v10.6: How to back up and restore your files
http://support.apple.com/kb/ht1553
-Griff W

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Tell us what you tried and what happened when you did.
The obvious thing to check, given the details you provided, is whether or not you turned on and configured the wifi in the gateway.

After trying all procedures I can find in Flash Player Help I still cannot play videos on Firefox, I

I am running Windows 7 64-bit and have tried every procedure I can find, and I still cannot get video on any browser.

Do you mean you can not play video but you can play game or other Flash contents?
What about version info page which is extremely simple Flash contents?
Hitomi

MacBook Pro won't connect to the internet after standby

Hallo all,
I have the following strange problem with my macbook pro:
- after going in stand by and returning in operating mode the mac won't connect to the internet, I have to follow the procedure in order to retry to connect but It does'not work. Go in network preferences, try to change the DNS, use and not use DHCP and so on but nothing change.
- Mac is working in ethernet, I can see other macs and pcs
- When I change the network to connect, same problem even if I turn off the mac.
I have the same problem with Iphone !!!!
I have linksys router and modem but I think that the reason could be a setting in mac.
Anyone can help me???

I tried re-installing Mountain Lion 10.8.3 but it didn´t help.
Assuming your can access email ok ?
First, install the OS X Mountain Lion Update v10.8.4 (Combo)
Then restart your Mac. That will reinstall any missing system files.
Then try Safari.

Firefox was working on my new iMac but then, after switching on recently, won't connect to the web – whereas Safari has no problem.

===
Hi
I bought an iMac a week ago and installed Firefox via Safari. It worked fine for a while but, after a recently switching on, it won't connect to the web whereas Safari has no problems.
I've tried following the Firefox Help, looking into the iMac firewall, but still no luck.
I've no idea whether related or not but yesterday I had a system glitch where the iMac stated no wi-fi was installed and only connected via a physical lead to my house router. Also, there was no sound output via Safari. However, after booting up today all seems well – apart from Firefox still not working. It loads the start page but can't access the web.
I have Little Snitch running, and wonder if that's the culprit... but it's working fine with Safari, seemingly.
(Finally, how do I stop a dialogue box appearing on start-up saying that "To open “X” you need a Java runtime. Would you like to install one now?)
Any ideas anyone?
Cheers
Rob / Sheffield / UK
===

On the wireless networks that your Mac has had trouble connecting to, do you know which Wireless Security type (WEP, WPA, or WPA2) is being used?
If it is WEP, one of the problems is that the actual standard relies on a 10 character HEX key for 40bit WEP and a 26 character HEX key for 128bit WEP. In order to make things easier, vendors use certain algorithms to convert simple alphanumeric passwords (or passphrases) into HEX keys, thus enabling the use of simple easy to remember WEP password rather than lengthy HEX keys. The problem is that different vendors use different algorithms to generate the HEX key and therefore a ASCII password on an AEBS will be hashed differently on a non-Apple client and vice versa. You may find the following Apple Support article helpful.

Installed iTunes 10.5 but after I restarted my computer it won't connect to the Internet. All other computers in the house connect to Internet just fine. Help!!

Installed iTunes 10.5 but after I restarted my computer it won't connect to the Internet. All other computers in the house connect to Internet just fine. Help!! I Did all the regular modem diagnostics but that computer won't connect and it's a hard wire connection, not wireless (too far from the wireless signal). Is anyone else having this problem?

Hello, might try this...
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.5, 10.6, 10.7 & 10.8…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x/10.8.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
IFor 10.5/10.6/10.7/10.8, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
(There may be better or faster DNS numbers in your area, but these should be a good test).
Click OK.

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.

I downloaded an update and now Firefox does not connect to the Internet. Having downloaded it again and again without avail, what do I do?

Firefox has gone haywire and won't connect to the Internet. I was prompted to install one of your updates and I did. Afterwards, it would no longer connect. I uninstalled and reinstalled it several times, but still I cannot connect to the Internet. My OS is Windows 7

After a Firefox upgrade/update, your firewall may not recognize that new version and will not allow access to the internet; that is your firewall doing its job. You may need to
#close Firefox (Firefox button > Exit or File > Exit)
#remove permissions for Firefox from your firewall's programs list
#restart Firefox
#allow your firewall to detect the new version and give the permissions needed by your firewall for Firefox to access the internet.
See --> [http://support.mozilla.com/en-US/kb/Cannot+connect+after+upgrading+Firefox Cannot connect after upgrading Firefox] 
See --> [https://support.mozilla.com/en-US/kb/Firewalls#w_configuring-firewalls Firewalls-Configuring firewalls]
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My iPod Touch 2nd generation won't connect to the Internet

After restoring my iPod Touch 2nd gen to factory settings because that's what iTunes advised me to do after doing the iTunes update a week ago, my iPod won't connect to the internet anymore. I was able to connect to our wifi but it won't go to any website, to iTunes, etc. I'm 100% sure the problem isn't our wifi because I'm using it right now with my laptop so it's not the wireless problem. Before restoring my iPod to factory settings iti has always worked and I never had a problem connecting it. I tried restoring it again but it still didn't work. I already also reset our router but still no luck. I wish someone could help me asap!! Thank you.

You can try:
- reset:
Reset iPod touch: Press and hold the On/Off Sleep/Wake button and the Home
button at the same time for at least ten seconds, until the Apple logo appears.
- Power off an then backon your router
- Reset network settings: Settings>General>Reset>Reset Network Settings
- The troubleshooting here:
iPhone and iPod touch: Troubleshooting Wi-Fi networks and connections

Firefox won't connect to the internet after trying all the troubleshooting, reinstalling, checking my firewall, etc. Help!

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