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Performance and connectivity

Site breakages

Resolve problems when websites don’t load or function correctly.

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

Websites don't load - troubleshoot and fix error messages

Resist Fingerprinting

Firefox can't load websites but other browsers can

How do I report a broken site in Firefox desktop?

Fix login issues on websites that require a username and password

Websites look wrong or appear differently than they should

Fix problems connecting to websites after updating Firefox

Configure firewalls so that Firefox can access the Internet

Firefox and other browsers can't load websites

Websites show a spinning wheel and never finish loading

Fix problems with Facebook games, chat and more

How to troubleshoot security error codes on secure websites

Websites say that Firefox is outdated or incompatible even though it's the latest version

TLS Error Reports

Troubleshoot issues related to add-ons

Difficulties opening or using a website in Firefox 100

Problems with email and how to find help

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Volunteer

Grow and share your expertise with others. Answer questions and improve our knowledge base.