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update Sync and save Chat and share Do more with apps Protect your privacy Manage preferences and problems with firefox not responding add-ons Fix slowness, crashing, error messages and other problems Fix problems with mozilla firefox problems websites (Facebook, YouTube, webmail etc.) Unblock Firefox from connecting to the Internet Procedures to diagnose and fix problems firefox problems 2016 Videos, sound, pictures and animations don't work Firefox is slow or stops working Firefox crashes Firefox won't save settings or remember information Problems with add-ons, plugins or unwanted software firefox problems loading pages Fix slowness, crashing, error messages and other problems Fix problems with websites (Facebook, YouTube, webmail etc.) Unblock Firefox from connecting to the Internet Procedures to diagnose and fix problems Videos, sound, pictures and animations don't work Firefox is slow or stops working Slowness or hanging Firefox crashes Crashing Firefox won't save settings or remember information Problems with add-ons,

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plugins or unwanted software Refresh Firefox - reset add-ons and settings Restore Firefox to its default settings while saving essential data. This can fix slowness, crashing, search hijacking and other problems. How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites This article explains why you might see the error code "SEC_ERROR_UNKNOWN_ISSUER" on HTTPS websites and how you can troubleshoot it. Accessibility not available during multi-process support Accessibility features are not yet fully supported in multiprocess Firefox. Restart Firefox to change it back to single process mode. How to troubleshoot time related errors on secure websites This article explains why you might see time-related errors on HTTPS websites and how you can troubleshoot them by correcting your system clock. Firefox Health Report - understand your browser performance Firefox Health Report lets you know how well your browser is performing and what steps you can take to improve it. What do the SSLv3 error messages mean on Firefox? When accessing a site with SSLv3, Firefox will block it and display an "Unable to connect securel

Firefox Basic browsing Install and update Sync and save Chat and share Do more with apps Protect your privacy Manage preferences

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and add-ons Fix slowness, crashing, error messages and other problems Fix problems with what's wrong with firefox today websites (Facebook, YouTube, webmail etc.) Unblock Firefox from connecting to the Internet Procedures to diagnose and fix problems firefox troubleshooting information Videos, sound, pictures and animations don't work Firefox is slow or stops working Firefox crashes Firefox won't save settings or remember information Problems with add-ons, plugins or unwanted software Fix slowness, https://support.mozilla.org/en-US/products/firefox/fix-problems crashing, error messages and other problems Fix problems with websites (Facebook, YouTube, webmail etc.) How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites This article explains why you might see the error code "SEC_ERROR_UNKNOWN_ISSUER" on HTTPS websites and how you can troubleshoot it. How to troubleshoot time related errors on secure websites This article explains why you might see time-related errors on https://support.mozilla.org/en-US/products/firefox/fix-problems/websites HTTPS websites and how you can troubleshoot them by correcting your system clock. Websites don't load - troubleshoot and fix error messages Are you having trouble getting a website to load? This article will show you how to fix the problem so you can get back to surfing the web. Configure firewalls so that Firefox can access the Internet A firewall controls what programs can access the Internet. Find information about configuring your firewall to allow Firefox access to the Internet. Fix problems connecting to websites after updating Firefox Learn to troubleshoot and fix problems connecting to websites that start immediately after updating to a new version of Firefox. Fix problems with Facebook games, chat and more This article describes how to troubleshoot problems, like those with games or chat, that you might encounter while using Facebook in Firefox. Firefox can't load websites but other browsers can We'll explain errors such as "Server not found" or "Unable to connect" and how to fix problems where Firefox can't access websites but other browsers can. Fix login issues on websites that require a username and password I

Discussion Edit Article Translate Article Show Translations What Links Here Show History Customize this article Firefox Version 51 Version 50 Version 49 Version 48 Version 47 https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings Version 46 Version 45 Windows 8 Windows 7/Vista Windows XP Mac Linux Windows https://support.mozilla.org/en-US/products/firefox/fix-problems/error-messages 10 Explore more topics Basic browsing Install and update Sync and save Chat and share Do more with apps Protect your privacy Manage preferences and add-ons Fix slowness, crashing, error messages and other problems Was this article helpful? Refresh Firefox - reset add-ons and settings (Redirected from Reset Firefox – easily fix most problems) with firefox This feature is available on Firefox for desktop or laptop computers. This feature has been improved in the latest version of Firefox. Update Firefox to the latest version to use the improved version. If you're having problems with Firefox, refreshing it can help. The refresh feature fixes many issues by restoring Firefox to its default state while saving your essential information like bookmarks, passwords, and open tabs. wrong with firefox Note: Extensions and extension data are removed. Refresh Firefox Click this Refresh Firefox button directly, if you are viewing this page in Firefox.This won't work if you are using a different browser or on a mobile device. You can also find a Refresh Firefox button at the top of the Firefox about:support Troubleshooting Information page. To continue, click Refresh Firefox in the confirmation window that opens. Firefox will close to refresh itself. When finished, a window will list your imported information. Click Finish and Firefox will open. Note: There's also a Refresh Firefox button in the Firefox Safe Mode window, if you can't start Firefox normally. If you are unable to find the Refresh Firefox button on your version of Firefox, you can also do a manual refresh by creating a new profile. See instructions on how to create a new profile. What does the refresh feature do? All of your Firefox settings and personal information are stored in a profile folder. The refresh feature works by creating a new profile folder for you while saving your important data. Add-ons which are normally stored inside the Firefox profile folder, such as extensions and themes, will be removed. Add-ons

... Firefox Basic browsing Install and update Sync and save Chat and share Do more with apps Protect your privacy Manage preferences and add-ons Fix slowness, crashing, error messages and other problems Fix problems with websites (Facebook, YouTube, webmail etc.) Unblock Firefox from connecting to the Internet Procedures to diagnose and fix problems Videos, sound, pictures and animations don't work Firefox is slow or stops working Firefox crashes Firefox won't save settings or remember information Problems with add-ons, plugins or unwanted software Fix slowness, crashing, error messages and other problems Error messages: what they mean and how to fix How to troubleshoot error messages on Firefox What does "Your connection is not secure" mean? When connecting to a website that uses an invalid TLS certificate or weak encryption, Firefox will display an error page saying "Your connection is not secure". How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites This article explains why you might see the error code "SEC_ERROR_UNKNOWN_ISSUER" on HTTPS websites and how you can troubleshoot it. Troubleshoot the "Secure Connection Failed" error message If Firefox can't access a secure (https) site you'll get a "Secure Connection Failed" page. Learn the reasons this happens and what to do. How to troubleshoot time related errors on secure websites This article explains why you might see time-related errors on HTTPS websites and how you can troubleshoot them by correcting your system clock. Warning Unresponsive script - What it means and how to fix it This article describes the reasons for this error message and covers possible solutions and workarounds. What do the SSLv3 error messages mean on Firefox? When accessing a site with SSLv3, Firefox will block it and display an "Unable to connect securely" message. "This Connection is Untrusted" error message appears - What to do This article explains what this error message means and how to bypass the war