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.
- Why do Java, Silverlight, Adobe Acrobat and other plugins no longer work? Since the release of version 52 in March 2017, Firefox no longer loads NPAPI plugins except Adobe Flash. Find out how it works and what you can do about it.
- 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.
- Plugins (like Flash) are 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 on or off.
- I found a fake Firefox update What to do if you spot fake notices claiming to contain an "urgent" or "critical" Firefox update.
- 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.
- 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.
- How to allow Java on trusted sites Learn how to activate Java in Firefox, if necessary, and where to find info about Java prompts and "Application Blocked by Security Settings" error messages.
- 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.
- 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.
- 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.
- Disable Pocket for Firefox Starting with Firefox version 38.0.5, Pocket is included by default. Here's how to remove it or re-enable it if you change your mind.
- 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.
- 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.
- What is search hijacking? This article describes the types of search hijacking that occur.
- 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.