Error In Firefox
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... 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 error message firefox problems Fix problems with websites (Facebook, YouTube, webmail etc.) Unblock Firefox from connecting to the javascript error firefox Internet Procedures to diagnose and fix problems Videos, sound, pictures and animations don't work Firefox is slow or stops working Firefox crashes
Error 500 Firefox
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
Java Error Firefox
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 error internet explorer 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 warning in Firefox if you need to. Fix "The bookmarks and history system will not be functional" error message This article explains what to do if you see the error message "The bookmarks and history system will not be functional" when you start Firefox. "Firefox is already running but is not responding" error message - How to fix it How to start Firefox if you see an error message, "Firefox is already running, but is not responding" or, on Mac OS X, "A copy of Fi
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Firefox Version 51 Version 50 Version 49 Version 48 Version 47 Version 46 firefox error console Version 45 Version 44 Version 43 Version 42 Version 41 Version 40 Version 39 Version 38 Windows 8 Windows firefox is already running error 7/Vista Windows 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 and add-ons Fix https://support.mozilla.org/en-US/products/firefox/fix-problems/error-messages slowness, crashing, error messages and other problems Was this article helpful? Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems If you are having problems with pages that use plugins (such as Adobe Flash, Java and others) to display content, you may need to check to see whether a plugin is causing the problem. Important: The new 64-bit version of Firefox https://support.mozilla.org/en-US/kb/troubleshoot-issues-with-plugins-fix-problems for Windows currently recognizes and supports only the Adobe Flash plugin. See this Mozilla blog post for details. Important: The new Windows 64-bit version of Firefox currently recognizes and supports only the Adobe Flash and Microsoft Silverlight plugins. Common problems caused by plugins include: Crashing or Hanging Images or multimedia items do not load Problems downloading This article describes how to troubleshoot plugins. If you are having a problem with an extension or theme, see Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems. For general information on plugins, see Use plugins to play audio, video, games and more. Table of Contents1 Determining if a plugin is the problem2 Updating or re-installing your plugins3 Manually uninstalling a plugin4 Re-initializing the plugins database Determining if a plugin is the problem You can selectively disable plugins while Firefox is running. If you suspect a certain plugin, disable it first, then test for your problem. If you don't know which plugin to disable: At the top of the Firefox window, click on the Firefox buttonOn the menu bar, click on the Tools menuAt the top of the Firefox window, click on the T
mean and how ... Firefox Basic browsing Install and update Sync and save Chat and share https://support.mozilla.org/ur/products/firefox/fix-problems/error-messages 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 https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean 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 error in 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 In English What does "Your connection is not secure" mean? How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure error in firefox websites Troubleshoot the "Secure Connection Failed" error message How to troubleshoot time related errors on secure websites Warning Unresponsive script - What it means and how to fix it What do the SSLv3 error messages mean on Firefox? "This Connection is Untrusted" error message appears - What to do Fix "The bookmarks and history system will not be functional" error message "Firefox is already running but is not responding" error message - How to fix it How to allow Java on trusted sites Warning Unresponsive plugin - What it means and how to fix it How to fix the Update Failed error message when updating Firefox Firefox says it's just updated every time it starts - how to fix How to run Firefox when your profile is missing or inaccessible 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
"Your connection is not ... Firefox Editing Tools Article 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 Version 46 Version 45 Version 44 Version 43 Version 42 Version 41 Version 40 Version 39 Version 38 Windows 8 Windows 7/Vista Windows 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 and add-ons Fix slowness, crashing, error messages and other problems Was this article helpful? What does "Your connection is not secure" mean? When Firefox connects to a secure website (the URL begins with "https://"), it must verify that the certificate presented by the website is valid and that the encryption is strong enough to adequately protect your privacy. If the certificate cannot be validated or if the encryption is not strong enough, Firefox will stop the connection to the website and instead show an error page. On some websites there is an option to report secure connection errors to Mozilla for statistical purposes: To troubleshoot secure connection problems with the error message Secure Connection Failed, see the Troubleshoot the "Secure Connection Failed" error message article. When Firefox connects to a secure website (the URL begins with "https://"), it must verify that the certificate presented by the website is valid and that the encryption is strong enough to adequately protect your privacy. If the certificate cannot be validated or if the encryption is not strong enough, Firefox will stop the connection to the website and instead show an error page: To troubleshoot secure connection problems with the error message Secure Connection Failed, see the Troubleshoot the "Secure Connection Failed" error message article. Table of Contents1 What to do if you see this error?2 Technical information2.1 The certificate will not be valid until (date)2.2 The certificate expired on (date)2.