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File a bug report or feature request for Mozilla products
Learn where to report a bug or file a feature request for Firefox, Thunderbird and other Mozilla products.
Writing guide for Knowledge Base articles
A Support Document Guide which includes picking a good title, writing a search summary, organizing your article, and a style guide.
Mozilla Support rules and guidelines
Rules and guidelines for using the Mozilla Support site.
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.
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