XPCOM

These pages contain documentation for Mozilla’s Cross-Platform Component Object Model (XPCOM) module. It abstracts core systems functionality for cross-platform use. The component architecture follows the standard COM approach.

Consuming XPCOM functionality

• Gecko Logging
• String Guide
• Reference Counting Helpers
• Thread safety analysis in Gecko
• XPCOM Collections
• XPCOM Hashtable Guide
• XPCOM Hashtable Technical Details
• MozPromise: C++ promises in Gecko
• Sorting and nsTArray
• XPCOMUtils module

Tooling around XPCOM

• Hunting Leaks

Writing new XPCOM interfaces/classes

• XPIDL
• Tutorial for Writing a New XPCOM Interface
• How to make a C++ class cycle collected
• {fmt} in Gecko
• User-defined types
• Formatting sequences
• MOZ_LOG integration
• ns*String integration
• Useful links