Performance and connectivity

Deal with error messages, crashing applications, connectivity issues, and slow performance.

firefox

මන්දගාමී firefox බ්රවුසරයක් වේගවත් කරන්නෙ කෙසේද?

Created: 2016-11-21

Safe Mode

Firefox's Safe Mode is used for troubleshooting and fixing problems. Learn how to get into Safe Mode and what the various options do.

Created: 2016-11-21

In English

How to troubleshoot time related errors on secure websites

Website will not allow Firefox to display the page if another site has embedded it

Connection settings in Firefox

How to troubleshoot security error codes on secure websites

What do the security warning codes mean?

Troubleshoot and diagnose Firefox problems

Firefox uses too much memory or CPU resources - How to fix

Resist Fingerprinting

Firefox can't load websites but other browsers can

DNS over HTTPS (DoH) FAQs

How do I report a broken site in Firefox desktop?

How to let Firefox use the internet on your Windows computer

Firefox DNS over HTTPS

Firefox hangs or is not responding - How to fix

Use the Troubleshooting Information page to help fix Firefox issues

How to reset the default user agent on Firefox

Task Manager - see whether tabs or extensions are slowing down Firefox

Where to go for developer support

Disable Firefox Sync

Certificate contains the same serial number as another certificate

Server Not Found - Troubleshoot connection problems

Unload inactive tabs to save system memory in Firefox

Firefox blocked by macOS 15 Sequoia firewall - What you need to know

Websites look wrong or appear differently than they should

HTTPS-First upgrades to secure connections

Rate your Firefox experience, surveys and out of date messages (Heartbeat)

Drag and Drop errors with Firefox Launcher Process enabled and Windows UAC disabled - How to Fix

Solutions for "Can not create temp folder archive" error when installing Firefox (Windows 10)

Firefox takes a long time to start up

Firefox does not work - Common fixes to get you back up and running

Identify problems caused by third-party modules in Firefox for Windows

X-Mouse Button Control in Firefox 110

Secure connection failed and Firefox did not connect

How to fix the Update Failed error message when updating Firefox

Warning Unresponsive script - What it means and how to fix it

Firefox uses too many CPU resources - How to fix

Websites say that Firefox is outdated or incompatible even though it's the latest version

Firefox says it's just updated every time it starts - how to fix

Fix "The bookmarks and history system will not be functional" error message

"Firefox is already running but is not responding" error - How to fix

Memory constraints, Firefox performance and Firewalls

How to resolve weak crypto error messages on Firefox

64-bit Firefox crashes with Citrix's XenApp VM

Captive portal detection

How to fix an error when trying to open Telegram or Slack on Firefox

Difficulties opening or using a website in Firefox 100

Firefox hangs when copying with Suggested Actions enabled on Windows 11 - What to do

Address screen sharing issues with Firefox on macOS 15 Sequoia

Bug 1931078

Troubleshoot Firefox crashes (closing or quitting unexpectedly)

Firefox is stuck in Troubleshoot Mode

Firefox repeatedly opens empty tabs or windows after you click on a link

Fix video and audio problems on Firefox for Windows N editions

Avoid crashes - Tips and tricks

Firefox keeps crashing at startup

Problems with email and how to find help

Home page with pipe character opens extra tabs when Firefox starts

How to run Firefox when your profile is missing or inaccessible

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