'''Do you experience problems getting a website to load?''' Don't worry -- we're here to help. This article will help you find the cause of it so you can go back to surfing the web again. __TOC__ = Does the problem happen on any website? = Is it just a particular website that isn't loading, or does this happen on any website? Try to visit another website you know usually works -- e.g. http://mozilla.org or http://google.com. If these websites don't load either, check out one of the following articles: * [[Firefox cannot load websites but other programs can]] - if you can view websites in browsers other than Firefox. * [[Cannot connect after upgrading Firefox]] - if you experience connection problems after updating Firefox. = Does it work in another web browser? = Is this really a Firefox problem, or is it a problem with your connection or the website itself? To find out, launch another web browser (e.g. {for win}Microsoft Internet Explorer{/for}{for mac}Safari{/for}{for linux}Epiphany or Konqueror{/for}) and visit the website using it. * If the website doesn't load in the other browser either, see [[No programs can load websites]]. * If the website works in the other browser but not in Firefox, keep on reading below. = Does the problem happen only on secure (https) websites? = Look at the web address in the location bar -- does it start with ''https://'' (with an "s")? If so, check if you see the error message in the following list and click it to find the solution: * [[Secure Connection Failed]] * [[Error code 500 accessing secure sites]] * [[Could not initialize the browser security component]] {for fx35} * [[This Connection Is Untrusted]] {/for} = Does the problem only occur on a single website? = So the problem only happens on a particular website -- let's get more specific about the problem you're experiencing to track down the cause of it. == Website loads, but doesn't work properly == If the website loads but is not working correctly (e.g. doesn't look right, doesn't function as intended), you should check out the following articles instead: * [[Warning Unresponsive script]] * [[Websites look wrong|The web page just doesn't look right]] {for win} * [[Firefox never finishes loading certain websites|Certain websites never finish loading]] {/for} * [[Cannot log in to websites]]. You may receive an error similar to ''We were unable to process your login request'' or ''An unspecified error has occurred'' when you attempt to sign into websites with your username and password, or the login may simply fail. == Connection is interrupted or reset == The following error messages are usually an indication that the website itself is having problems: * '''The connection was interrupted''' * '''The connection was reset''' * '''The connection has timed out''' If you can visit the website in other browsers but not in Firefox, it might be a problem with Firefox's cache. Here's how you fix that: [[T:clearCookiesCache]] == Proxy errors == The following error messages indicate proxy problems: * '''The proxy server is refusing connections''' * '''Unable to find the proxy server''' This error indicates that Firefox is trying to access the Internet through a [http://en.wikipedia.org/wiki/Proxy_server proxy server]. To check your proxy settings: # [[T:optionspreferences]] # Select the {menu Advanced} panel. # Select the '''Network''' tab. # In the Connection section, click {button Settings...}. # 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 {for win}(Such as Internet Explorer. See [http://support.microsoft.com/kb/135982 Microsoft's guide to proxy settings]){/for}{for mac}(Such as Safari. See [http://docs.info.apple.com/article.html?path=Safari/3.0/en/9299.html Apple's guide to proxy settings]){/for}. # Close the Connection Settings window. # [[T:closeOptionsPreferences]] = Other, less common problems = == The ... plugin has crashed == This means that a plugin which is being used to display content on the current page has unexpectedly quit. * See [[Plugin crash reports]] == Malicious website errors== If you receive one of the following errors, Firefox has blocked access to the website you're visiting to protect you from [http://en.wikipedia.org/wiki/Malware malware] or [http://en.wikipedia.org/wiki/Phishing web forgery (phishing)]. * '''Suspected Attack Site!''' * '''Suspected Web Forgery!''' For more information, see [http://www.mozilla.com/en-US/firefox/phishing-protection/ Phishing and Malware Protection (Mozilla.com)]. == Offline mode == {for fx35}Your operating system indicates to Firefox whether it is connected to the Internet. If it reports that it is not connected, Firefox will go into offline mode.{/for}{for not fx35}If you see a message about offline mode, you may have set Firefox not to use your network connection.{/for} Make sure your computer has a network connection and then: {for fx35} *{for win,linux}At the top of the Firefox window,{/for}{for mac}On the menu bar,{/for} click on the {menu File} menu and make sure that {menu Work Offline} is unchecked. {/for} {for not fx35} *{for linux}At the top of the Firefox window,{/for}{for mac}On the menu bar,{/for} {for linux,mac}click on the {menu File} menu and make sure that {menu Work Offline} is unchecked.{/for}{for win}Press the {key Alt} key to temporarily turn on the Menu Bar, click on the {menu File} menu (Windows XP, just click on the {menu File} menu) and make sure that {menu Work Offline} is unchecked. {/for} == The page isn't redirecting properly == This problem can be caused by problems with cookies: * See [[Websites say cookies are blocked]]. == File not found == If you experience this error trying to access a website, see: * [[Troubleshooting extensions and themes]] * [[Is my Firefox problem a result of malware]] == Content Encoding Error == <!--Rogue firewall or incorrect proxy (sometimes from the firewall, sometimes from a web-accelerator) is a common cause. However, cookies/cache, extensions/themes/plugins, and corrupt preferences can cause it too.--> The following error messages indicate a content encoding problem: * '''Content Encoding Error''' * '''The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression''' Several problems can result in a content encoding error message. To diagnose and fix: # Check the settings of any Internet security applications you use (including firewalls, anti-virus or anti-spyware programs, and privacy protection programs). You should try to remove any permissions those applications have for Firefox, and then add them again. For program-specific instructions for a number of applications, see [[Firewalls]]. # Follow the [[Basic Troubleshooting|Standard troubleshooting steps]]. == This address is restricted == This error occurs when you are attempting to connect to a web server on a [http://en.wikipedia.org/wiki/Tcp_port port] that is reserved for another application. If the web address (URL) you are trying to visit contains a colon followed by a number (e.g. ''http://webserver.tld:23''), try removing that portion (e.g. ''http://webserver.tld'') or replacing it with '':80'' (e.g. ''http://webserver.tld:80'') If specifying a different port does not work, you may have been given an incorrect web address. <!-- MZ credit --> <br/> <br/> '''''Based on information from [http://kb.mozillazine.org/Error_loading_websites Error loading websites (mozillaZine KB)]'''''

Do you experience problems getting a website to load? Don't worry -- we're here to help. This article will help you find the cause of it so you can go back to surfing the web again.

Does the problem happen on any website?

Is it just a particular website that isn't loading, or does this happen on any website? Try to visit another website you know usually works -- e.g. http://mozilla.org or http://google.com. If these websites don't load either, check out one of the following articles:

• Firefox can't load websites but other browsers can - if you can view websites in browsers other than Firefox.
• Fix problems connecting to websites after updating Firefox - if you experience connection problems after updating Firefox.

Does it work in another web browser?

Is this really a Firefox problem, or is it a problem with your connection or the website itself? To find out, launch another web browser (e.g. Microsoft Internet ExplorerSafariEpiphany or Konqueror) and visit the website using it.

• If the website doesn't load in the other browser either, see Firefox and other browsers can't load websites.
• If the website works in the other browser but not in Firefox, keep on reading below.

Does the problem happen only on secure (https) websites?

Look at the web address in the location bar -- does it start with https:// (with an "s")? If so, check if you see the error message in the following list and click it to find the solution:

• Secure connection failed and Firefox did not connect
• Error code 500 accessing secure sites
• Fix the "Could not initialize the application's security component" error message

Does the problem only occur on a single website?

So the problem only happens on a particular website -- let's get more specific about the problem you're experiencing to track down the cause of it.

Website loads, but doesn't work properly

If the website loads but is not working correctly (e.g. doesn't look right, doesn't function as intended), you should check out the following articles instead:

• Warning Unresponsive script - What it means and how to fix it
• The web page just doesn't look right

• Fix login issues on websites that require a username and password. You may receive an error similar to We were unable to process your login request or An unspecified error has occurred when you attempt to sign into websites with your username and password, or the login may simply fail.

Connection is interrupted or reset

The following error messages are usually an indication that the website itself is having problems:

• The connection was interrupted
• The connection was reset
• The connection has timed out

If you can visit the website in other browsers but not in Firefox, it might be a problem with Firefox's cache. Here's how you fix that:

1. Click the menu button to open the menu panel.
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 OKClear Now.

Proxy errors

The following error messages indicate proxy problems:

• The proxy server is refusing connections
• Unable to find the proxy server

This error indicates that Firefox is trying to access the Internet through a proxy server. To check your proxy settings:

1. In the Menu bar at the top of the screen, click Firefox and then select Preferences or Settings, depending on your macOS version.Click the menu button and select Settings.
2. Select the Advanced panel.
3. Select the Network tab.
4. In the Connection section, click Settings....
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 Apple's guide to proxy settings).
6. Close the Connection Settings window.
7. Close the Settings page. Any changes you've made will automatically be saved.

Other, less common problems

The ... plugin has crashed

This means that a plugin which is being used to display content on the current page has unexpectedly quit.

• See Send plugin crash reports to help Mozilla improve Firefox

Malicious website errors

If you receive one of the following errors, Firefox has blocked access to the website you're visiting to protect you from malware or web forgery (phishing).

• Suspected Attack Site!
• Suspected Web Forgery!

For more information, see Phishing and Malware Protection (Mozilla.com).

Offline mode

Your operating system indicates to Firefox whether it is connected to the Internet. If it reports that it is not connected, Firefox will go into offline mode.If you see a message about offline mode, you may have set Firefox not to use your network connection. Make sure your computer has a network connection and then:

The page isn't redirecting properly

This problem can be caused by problems with cookies:

• See Websites say cookies are blocked - Unblock them.

File not found

If you experience this error trying to access a website, see:

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems
• Troubleshoot Firefox issues caused by malware

Content Encoding Error

The following error messages indicate a content encoding problem:

• Content Encoding Error
• The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression

Several problems can result in a content encoding error message. To diagnose and fix:

1. Check the settings of any Internet security applications you use (including firewalls, anti-virus or anti-spyware programs, and privacy protection programs). You should try to remove any permissions those applications have for Firefox, and then add them again. For program-specific instructions for a number of applications, see Configure firewalls so that Firefox can access the Internet.
2. Follow the Standard troubleshooting steps.

This address is restricted

This error occurs when you are attempting to connect to a web server on a port that is reserved for another application.

If the web address (URL) you are trying to visit contains a colon followed by a number (e.g. http://webserver.tld:23), try removing that portion (e.g. http://webserver.tld) or replacing it with :80 (e.g. http://webserver.tld:80)

If specifying a different port does not work, you may have been given an incorrect web address.

Based on information from Error loading websites (mozillaZine KB)