Fix slowness, crashing, error messages and other problems

Problems with add-ons, plugins or unwanted software

• Add-on signing in Firefox Learn about add-on signing and what to do if an extension you want to use could not be verified for use in Firefox.
• The Flash plugin is blocked on some sites by default Firefox automatically blocks Flash on some websites that may cause problems but you have the option to turn this block on or off.
• What is search hijacking? This article describes the types of search hijacking that occur.
• How to update add-ons This article explains how to update your Firefox add-ons from the Extensions panel in the Add-ons Manager.
• Flash Plugin - Keep it up to date and troubleshoot problems The Adobe Flash plugin lets you view video and animated content in Firefox. Learn how to install and update Flash and fix problems with it.
• Unable to install add-ons (extensions or themes) This article describes various reasons that would cause an add-on not to be able to be installed and what you can do to fix the issue.
• Re-enable add-ons that were disabled when updating Firefox Many add-ons are automatically compatible with the latest Firefox. For those that aren't, we'll show you how to search for new versions or find an alternative.
• Adobe Flash plugin has crashed - Prevent it from happening again If the Flash plugin often stops working and you see the message "The Adobe Flash plugin has crashed", this article will help you solve the problem.
• Send plugin crash reports to help Mozilla improve Firefox When a plugin crashes, you may see a sad face with a link to send a crash report. Sending these reports before reloading the page helps us improve Firefox.
• Upgrade your graphics drivers to use hardware acceleration and WebGL Firefox and plugins can use your graphics card to speed things up. To enable this or to fix problems, you may need to update the graphics card drivers.
• PDF files are blank or cause an error message on Mac The Adobe Acrobat NPAPI plugin can cause problems viewing PDF files in Firefox. Learn how to fix this and your options for viewing PDF files.
• How to remove the Babylon toolbar, home page and search engine Babylon translation software adds a toolbar and changes settings in your browsers. This article explains how to remove Babylon and restore Firefox to normal.
• Remove a toolbar that has taken over your Firefox search or home page This article will help you remove unwanted third-party toolbars from Firefox and restore the default search, New Tab and home page settings.
• Disable or re-enable Pocket for Firefox The Pocket feature is included with Firefox by default. Learn how to disable or remove Pocket from Firefox and how to re-enable it.
• Cannot remove an add-on (extension or theme) This article describes how to uninstall an extension or theme that can't be removed normally. This includes problematic toolbars and search bars.
• Why do Java, Silverlight, Adobe Acrobat and other plugins no longer work? Since the release of Firefox version 52 in March 2017, NPAPI plugins no longer load, except for Adobe Flash. Learn more about this change.
• I found a fake Firefox update What to do if you spot fake notices claiming to contain an "urgent" or "critical" Firefox update.