Performance and connectivity
Crashing and slow performance
Troubleshoot issues with app crashes or slow performance.
Task Manager - see whether tabs or extensions are slowing down Firefox
Firefox has a feature that lets you see how much memory and CPU resources are being used by tabs, extensions and other processes. Learn more.
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2 weeks, 6 days ago
Firefox blocked by macOS 15 Sequoia firewall - What you need to know
Some macOS 15 users may have Firefox blocked by the firewall. Learn about the issue and how to help Mozilla investigate.
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Mozilla Crash Reporter
The Mozilla Crash Reporter dialog box appears when Firefox crashes and lets you send a crash report. Learn how it works and how to access your crash reports.
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Firefox won't start - find solutions
This article explains what to do if the Firefox window does not open or you get an error message when you try to start Firefox.
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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.
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Identify problems caused by third-party modules in Firefox for Windows
Identify problems caused by third-party modules in Firefox for Windows.
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Firefox crashes - asking for support
If nothing in the documentation seems to resolve issues with a Firefox crash, our community support forum volunteers may be able to help.
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64-bit Firefox crashes with Citrix's XenApp VM
The API hooks from Citrix XenApp 7.13 VDA do not work with 64-bit Firefox. How to find a workaround.
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Updating processor microcode
Processor bugs may cause crashes. Microcode updates address processor bugs.
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Crash on Broadwell-U with old microcode
Intel Broadwell-U processors need a microcode update to avoid Firefox crashes
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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.
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Difficulties opening or using a website in Firefox 100
A potential temporary solution if a web page is not opening correctly in Firefox 100.
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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.
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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.
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Fix video and audio problems on Firefox for Windows N editions
If Firefox has trouble playing video or music on a Windows computer, you can install the Media Feature Pack, if it's missing. Learn more.
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Avoid crashes - Tips and tricks
Here are some easy things you can do to avoid crashes and keep Firefox running in tip-top shape.
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Firefox keeps crashing at startup
If Firefox keeps crashing when you try to start it and other solutions don't work, a clean reinstall can often fix the problem.
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