Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Writing guide for Knowledge Base articles

Writing guide for Knowledge Base articles

This Mozilla Support Document Guide includes picking a good title, writing a search summary, organizing your article and a style guide.

Contributors guide on Firefox advanced customization with CSS

Contributors guide on Firefox advanced customization with CSS

What you need to know about Firefox customization with the userChrome.css file and how to help users get more help or revert their changes.

How to contribute to article localization

How to contribute to article localization

Learn how to translate SUMO articles in to your native language.

Contributors guide for writing a good bug

Contributors guide for writing a good bug

This article explains how to use Bugzilla to report and explain issues you encounter into something a Mozilla engineer can work with.

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