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Firefox Ipv6



I had this problem but I was using a proxy. In Firefox, if your proxy is an ipv4 ip address, ie. 127.0.0.1, it'll use ipv4 for any websites. If you use the ipv6 for the proxy, ie.::1, it'll prefer ipv6 for websites, but will still use ipv4 if there isn't ipv6 available. As of recent, Chrome, Firefox as well as derived browsers actually avoid IPv6 if a site responds faster over IPv4. It is not possible to change this behavior by means of a configuration setting. The feature itself is probably reasonable for the common user but it almost drives me mad that you cannot disable it. Actual results: Despite the fact that the website can be connected by IPv6 (using NAT64/DNS64), Firefox does not always connect via IPv6. If I browse Amazon Japan, it detects my actual location (This item can be delivered to (a country in the Asia-Pacific region)). Firefox will also make connections to this URL to check if your current network supports IPv6. To disable this feature: Type about:config in the address bar and press Enter Return. Make Firefox and other clients prefer IPv6. Ask Question Asked 4 years, 1 month ago. Active 4 years, 1 month ago. Viewed 3k times 0. I have a tunnel set up between my laptop and server, using OpenVPN 2.3.10 on the client and 2.3.13 on the server. It was originally set up for IPv4 to masquerade my IP address to be my server IP address and to.

If you have a problem connecting to a website, you may see error messages like Server Not Found. This article describes how to troubleshoot problems that cause this error.

  • For troubleshooting other error messages, see Error loading websites.

Table of Contents

  • 3Firefox cannot load websites but other browsers can
  • 4Firefox cannot load certain websites

To begin, try opening a website in another browser (such as Internet ExplorerSafariEpiphany or Chromium).

  • If all other browsers cannot load the website, move on to the No browsers can load websites section.
  • If the other browsers can load the website, skip ahead to the Firefox cannot load websites but other browsers can section.

If neither Firefox nor your other browser can load websites, your problem is not in Firefox so you should seek help elsewhere.Apple support includes these articles:Microsoft support includes these articles:

  • (OS X 10.8 Mountain Lion): If you can't connect to the Internet
  • (OS X 10.9 Mavericks): Solve problems with connecting to the Internet
  • (OS X 10.10 Yosemite): Solve problems connecting to the Internet
  • (OS X 10.11 El Capitan): Solve problems connecting to the Internet
  • (OS X 10.12 Sierra): Troubleshoot connecting to the Internet
  • (Windows 10): Why can't I get online? and Fix network connection issues in Windows 10
  • (Windows 8): Why can’t I get connected?
  • (Windows 7): Why can’t I get connected?
  • (Windows Vista): How to troubleshoot network connectivity problems in Internet Explorer
  • (Windows XP): How to troubleshoot home networking in Windows XP

You should also check the following:You should begin by checking the following:

  • Make sure your modem and/or router are both on and are not indicating errors.
  • If you are using a wireless connection, make sure that you are connected to the right access point.
  • Make sure your Internet security software (including firewalls, antivirus programs, anti-spyware programs, and more) is not blocking connections to the Internet. For instructions on how to configure these programs, see the Configure firewalls so that Firefox can access the Internet article.
  • If you use a proxy server, make sure that the proxy server can connect to the Internet. For instructions on configuring proxy settings in Firefox, see Firefox connection settings below.
Firefox Ipv6

If Firefox cannot load websites, but your other browser can, follow the instructions below.

Cannot load websites after updating Firefox

If you were able to load websites until you updated Firefox, your Internet security software (including firewalls, antivirus programs, anti-spyware programs, and more) is likely preventing Firefox from connecting to the Internet. Some Internet security programs can block Internet access even when they are in a 'disabled' state.

In general, you should remove Firefox from your program's list of trusted or recognized programs, then add it back. For instructions on how to configure these programs, see the Configure firewalls so that Firefox can access the Internet article.

Firefox connection settings

If you connect to the Internet through a proxy server that is having connection problems, you will not be able to load websites. To check your connection settings in Firefox:

Firefox Ipv6 Ip

  1. In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button and select ...
  2. Select the General panel.
  3. Scroll down to Network Proxy and click .
  4. Change your proxy settings:
    • If you don't connect to the Internet through a proxy (or don't know whether you connect through a proxy), select No Proxy.
    • If you connect to the Internet through a proxy, compare Firefox's settings to another browser's (such as Internet Explorer - see Microsoft's guide to proxy settings) (such as Safari - see Safari for Mac: Set up a proxy server with Safari).
  5. Click to close the Connection Settings window.
  6. Close the about:preferences page. Any changes you've made will automatically be saved.
  1. In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button and select ...
  2. Select the Advanced panel.
  3. Select the Network tab.
  4. In the Connection section, click .
  5. Change your proxy settings:
    • If you don't connect to the Internet through a proxy (or don't know whether you connect through a proxy), select No Proxy.
    • If you connect to the Internet through a proxy, compare Firefox's settings to another browser's (such as Internet Explorer - see Microsoft's guide to proxy settings) (such as Safari - see Safari for Mac: Set up a proxy server with Safari).
  6. Click to close the Connection Settings window.
  7. Close the about:preferences page. Any changes you've made will automatically be saved.

DNS Prefetching

DNS Prefetching is a technique Firefox uses to speed up loading new websites. To disable DNS Prefetching:

  1. Type about:config in the address bar and press EnterReturn.
    A warning page may appear. Click to go to the about:config page.
  2. Right-clickHold down the control key while you click in the list of preferences, select New, and then select Boolean.
  3. In the Enter the preference name field, enter network.dns.disablePrefetch and click .
  4. Select true when prompted to set the value and click .
  1. Type about:config in the address bar and press EnterReturn.
    A warning page may appear. Click to go to the about:config page.
  2. In the Search field at the top of the page, enter network.dns.disablePrefetch.
  3. If the preference does not already exist, select Boolean and click the Add button to create the preference.
  4. Change the preference value from false to true by pressing the Toggle button.

IPv6

Firefox supports IPv6 by default, which may cause connection problems on certain systems. To disable IPv6 in Firefox:

Firefox For Windows 10

  1. Type about:config in the address bar and press EnterReturn.
    A warning page may appear. Click to go to the about:config page.
  2. In the Search field, enter network.dns.disableIPv6
  3. In the list of preferences, double-clickclick the Toggle button next tonetwork.dns.disableIPv6 to change its value from false to true.

If you find that Firefox can load some websites but not others, first clear your Firefox cookies and cache:

  1. Click on the menu button to open the menu panel.Click the Library button on your toolbar. (If you don't see it there, click the menu button then click Library.)
  2. Click History and select Clear Recent History….
  3. In the Time Range to clear: drop-down, select Everything.
  4. Below the drop-down menu, select both Cookies and Cache. Make sure other items you want to keep are not selected.
  5. Click .

Check for malware

If clearing your cookies and cache did not enable you to load the websites that did not work in Firefox, you should check your computer for malware. Certain types of malware are known to target Firefox and can prevent it from loading various websites:

  • If you have an antivirus or Internet security program, update its detections database and do a full scan of your system.
  • If you still have problems, see How do I get rid of malware?.


Based on information from Error loading websites (mozillaZine KB)

What is IPv6?

In order to connect devices over the Internet, each device must have an Internet protocol (IP) address. The current IP system is Version 4 (IPv4), which makes available over four billion IP addresses. However, the huge increase in Internet users and devices worldwide means that IPv4 addresses are running out. IPv6, the next-generation protocol, provides approximately 340 undecillion IP addresses (see Figure 1), ensuring availability of new IP addresses far into the future, as well as promoting the continued expansion and innovation of Internet technology.

Why is IPv6 important? How will it affect me?

As the network transitions from IPv4 to IPv6 addresses, the Internet and online services will continue to operate. Internet service providers (ISPs) will be upgrading to IPv6, and most personal computer operating systems support IPv6. However, many routers and servers currently in use don’t support it, making a connection between a device with an IPv6 address to a router or server that only supports IPv4 difficult. During the transition, steps will be taken by ISPs and Internet content and application providers to ensure that IPv4 addresses will continue to be supported. However, if the switch to IPv6 is not done or not complete, online services could be impaired or degraded: your favorite web programs may slow down; computers may have a harder time communicating with each other, impairing the ability to offer services like voice-over-IP and web conferencing; and your privacy could be compromised because of increased dividing and transferring of IPv4 addresses. It is important that the transition to IPv6 be supported by all parties involved with the Internet, and that IPv6 compatibility be considered when new Internet and computer products are purchased.

When will the transition to IPv6 occur? How much longer will IPv4 work?

The transition to IPv6 will take place over many years, with both IPv4 and IPv6 addresses being used in parallel. There is no 'flag date' when IPv4 addresses will stop working. However, an increasing amount of Internet content and applications will be available only at IPv6 addresses. In order to ensure access to these in the future, consumers should ensure that new equipment and software they purchase is IPv6 ready.

What equipment, software and services will I need to buy or replace for IPv6?

Some equipment and software that you have bought is already IPv6 ready; some is not. IPv4 equipment and software may work for a long time during the transition. Before buying new equipment, however, consumers should check their existing equipment for IPv6 compatibility. Equipment and applications to check include:

  • Computer operating systems such as Mac OS X, Windows and Android;
  • Computer networking equipment such as cable and DSL modems, wireless access points (“WiFi routers”), routers and home gateways;
  • Networked home electronics such as Blu-ray players, AV receivers and television sets capable of connecting to the Internet;
  • Home security systems that use IP networks;
  • Internet service providers (ISPs);
  • Web browsing software such as Internet Explorer and Firefox;
  • Computer security software such as firewalls and anti-virus programs; and
  • Voice-over-IP and video conferencing programs.

How can I tell if my Internet service, software or equipment is compatible with IPv6?

A free online network service test is available at http://test-ipv6.com/. In addition, check the websites of your ISP and of Internet services you use for IPv6 information. New computer equipment and software may have the “IPv6 Ready” logo on its packaging, as well as relevant information within owner’s manuals, typically in the technical specifications section.

For more information

“Everyday Users: A Short Guide to IPv6”, a web-based guide by the Internet Society: www.internetsociety.org/everyday-users-short-guide-ipv6

The IPv6 Ready Logo Program’s homepage: www.ipv6ready.org

American Registry of Internet Numbers, IPv6 Information Center: www.arin.net/knowledge/ipv6_info_center.html

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Internet Protocol Version 6 (IPv6) Consumers Guide (pdf)