Fix problems
Troubleshoot slowness, crashing and error messages.
How to pin and unpin Firefox from the taskbar on Windows 10 and Windows 11
Learn how to pin and unpin Firefox from the taskbar in Windows 10 and Windows 11.
Last updated: 2 weeks, 4 days ago
Refresh Firefox - reset add-ons and settings
A Refresh can fix many issues by restoring Firefox to its default state while saving essential information like bookmarks and passwords.
Last updated: 5 months, 4 weeks ago
Recover user data missing after Firefox update
If your bookmarks, passwords, preference settings and other data are missing, it may be available in another Firefox profile. Learn more.
Last updated: 1 year, 6 months ago
How do I report a broken site in Firefox desktop?
How to report a broken website and what information Mozilla receives when you report breakage caused by Enhanced Tracking Protection.
Last updated: 3 months, 1 week ago
Total Cookie Protection and website breakage FAQ
Learn about Enhanced Tracking Protection and Total Cookie Protection in Firefox, and how to troubleshoot and report possible site breakage.
Last updated: 1 year ago
Certificate contains the same serial number as another certificate
Why Firefox may show you a Secure Connection Failed error when you try to access the configuration page for your router and what to do.
Last updated: 5 years, 2 months ago
What happened to Firefox Send?
Firefox Send has been discontinued as of September 17th, 2020. Thank you for trying Firefox Send in the past.
Last updated: 10 months, 4 weeks ago
Playing 4K (Ultra-High Definition) YouTube videos in Firefox
Why the 4K option shows up for some viewers while it doesn't for others.
Last updated: 1 year, 11 months ago
Firefox keeps asking me for Primary Password
How to resolve an issue where Firefox asks for a Primary (formerly "Master") Password if you have AVG or Eset Internet Security installed.
Last updated: 1 year, 11 months ago
Compatibility with Exploit protection on Windows
Firefox Compatibility with Windows Exploit protection.
Last updated: 1 year, 11 months ago
Identify problems caused by third-party modules in Firefox for Windows
Identify problems caused by third-party modules in Firefox for Windows.
Last updated: 1 year, 2 months ago
I can’t play audio on a Remote Desktop Connection
How to solve a known issue with audio playback when you use Firefox on a Remote Desktop Connection.
Last updated: 1 year, 11 months ago
Can I use my screen reader with the new Firefox?
Users on slower computers have reported problems viewing certain web pages with some screen readers in Firefox 57 and above. Learn more.
Last updated: 3 years, 6 months ago
File system paths on Linux are always treated as UTF-8
On Linux, the profile path is required to be valid UTF-8. Names of downloaded files are encoded in UTF-8 regardless of glibc and glib settings.
Last updated: 6 years, 4 months ago
Videos don't have sound on Citrix
How to fix audio problems when you try to watch videos while using the Citrix Server on Windows.
Last updated: 1 year, 11 months ago
Facebook Container isn't working
What to do if Facebook Container doesn't work.
Last updated: 3 years ago
Drag and Drop errors with Firefox Launcher Process enabled and Windows UAC disabled - How to Fix
How to fix Firefox drag-and-drop errors when running Windows as Administrator with UAC disabled and the Launcher Process enabled.
Last updated: 3 years, 10 months ago
Why is each open Firefox tab showing up in the Windows volume mixer?
If each open Firefox tab shows up in your Windows volume mixer, a fix will be released in Firefox version 76. Here is a workaround in the meantime.
Last updated: 3 years ago
Unable to download files in Windows 10 when Parental Controls are on
There was a known issue in Firefox version 69 and Beta 70 that prevented you from downloading files in Windows 10 when parental controls were on.
Last updated: 4 years, 5 months ago
Workaround to make Estonian Smartcards work in Firefox 76+
Estonian Smart Cards are not working for some users in Firefox 76 and above. Here's how to make them work.
Last updated: 1 year, 11 months ago
CCleaner is deleting Firefox extension settings in Firefox 79
Learn about workaround for a CCleaner but that's deleting saved Firefox extension settings in Firefox 79.
Last updated: 3 years, 9 months ago
How to fix an error when trying to open Telegram or Slack on Firefox
How to fix the NS_ERROR_DOM_ABORT_ERR while trying to open web.telegram.org or app.slack.com on Firefox 87 or above.
Last updated: 1 year, 9 months ago
Solutions for "Can not create temp folder archive" error when installing Firefox (Windows 10)
Stuck with the "Can not create temp folder archive" error on 7-Zip when installing Firefox for Windows 10? This article will help you to solve the issue.
Last updated: 2 years, 11 months ago
Difficulties opening or using a website in Firefox 100
A potential temporary solution if a web page is not opening correctly in Firefox 100.
Last updated: 1 year, 11 months ago
Firefox hangs when copying with Suggested Actions enabled on Windows 11 - What to do
Firefox can freeze or stop responding when copying, with the Suggested Actions feature enabled on Windows 11. Learn how to fix the problem.
Last updated: 1 year, 7 months ago
X-Mouse Button Control in Firefox 110
Learn about an issue with X-Mouse Button Control in Firefox 110 for Windows.
Last updated: 1 year, 2 months ago
Why aren’t my add-ons working on some websites?
Learn why some Firefox extensions have been disabled on certain websites, how to manage these limits, and explore alternative solutions.
Last updated: 10 months, 3 weeks ago
Troubleshoot Firefox crashes (closing or quitting unexpectedly)
Learn how to troubleshoot and fix Firefox crashes, and find out how to get more help if you're having problems solving the issue.
Last updated: 5 months, 2 weeks ago
