Fix Firefox Error
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preferences to ... Firefox Editing Tools Article Discussion Edit Article Translate Article Show Translations problems with firefox not responding What Links Here Show History Customize this article Firefox Version 51
Mozilla Firefox Problems
Version 50 Version 49 Version 48 Version 47 Version 46 Version 45 Windows 8 Windows 7/Vista Windows firefox problems loading pages XP Mac Linux Windows 10 Explore more topics Basic browsing Install and update Sync and save Chat and share Do more with apps Protect your privacy Manage preferences
Firefox Problems 2016
and add-ons Fix slowness, crashing, error messages and other problems Was this article helpful? Reset Firefox preferences to troubleshoot and fix problems Resetting preferences (zoom, tabs, privacy, network, encryption, updates, where to save file downloads, etc.) is one of many procedures that can be helpful in troubleshooting Firefox problems. We'll explain two ways to do this. what is wrong with firefox lately If changes to preference settings are not saved when you restart Firefox, see How to fix preferences that won't save. Table of Contents1 Solution 1: Refresh Firefox2 Solution 2: Delete Firefox preference files Solution 1: Refresh Firefox Note: When using the refresh feature, your bookmarks, browsing history, open tabs, windows, passwords, cookies and web form auto-fill information will be saved. However, your extensions and themes will be removed and your preferences will be reset.When using the reset feature, your bookmarks, browsing history, open tabs, windows, passwords, cookies and web form auto-fill information will be saved. However, your extensions and themes will be removed and your preferences will be reset.When using the reset feature, your bookmarks, browsing history, passwords, cookies and web form auto-fill information will be saved. However, your extensions and themes will be removed; open tabs, windows and tab groups will not be saved; and your preferences will be reset. Learn more. Click this Refresh Firefox button directly, if you are viewing this page in Firefox.This
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,
Firefox Crashing Constantly
crashing, error messages and other problems Fix problems with websites (Facebook, YouTube, webmail
What's Wrong With Firefox Today
etc.) Unblock Firefox from connecting to the Internet Procedures to diagnose and fix problems Videos, sound, pictures and animations firefox troubleshooting information 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 Fix https://support.mozilla.org/en-US/kb/reset-preferences-fix-problems 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 websites and how you can troubleshoot them by correcting https://support.mozilla.org/en-US/products/firefox/fix-problems/websites 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. 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 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. Fix login issues on websites that require a username and password If you find that you can't log in to a website that requires a username and password, follow the steps
browsing Install and update Sync and save Chat and share Do more with apps Protect your privacy Manage preferences and add-ons Fix https://support.mozilla.org/en-US/products/firefox/fix-problems/slowness-or-hanging 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 with firefox problems Firefox is slow or stops working Slowness or hanging Firefox is slow - How to make it faster The article covers the steps you can take to make Firefox run faster. Firefox uses too much memory (RAM) - How to fix This article describes how to make Firefox use less memory to make it run faster and prevent crashes. Firefox hangs or is not wrong with firefox responding - How to fix When Firefox hangs, it stops responding to your clicks and doesn't seem to do anything. This article covers the various solutions depending on when they happen. Firefox takes a long time to start up This article describes some causes of a long start up time and steps you can take to improve it. Firefox uses too many CPU resources - How to fix At times, Firefox may require significant CPU resources to display content. We'll show you options for fixing this if this if it is happening too often. Firefox Health Report says your browser is running slower than usual If the Firefox Health Report says that your browser is running slow, try a refresh to reset Firefox and make it fast again. Firefox does not work - Common fixes to get you back up and running Find solutions to Firefox issues like crashing, not starting, slowness and websites not loading. Portions of this content are ©1998–2016 by individual mozilla.org contributors. Content available under a Creative Commons license. Contact Us Privacy Policy Legal Notices Report Trademark Abuse Source Code Twitter Facebook Firefox Friends Switch to mobile site