Networking

The Necko (aka Networking) component is Gecko’s implementation of the web’s networking protocols. Most of the component’s source lives in netwerk directory and this document’s source can be found in netwerk/docs. This page points to helpful resources for developers interested in contributing to Necko.

Necko’s wiki page is dedicated to help users of firefox and bug authors. Readers can find various information related to bug filing, configuration of various networking features in the wiki page.

The team can be reached:

• on Matrix: #necko:mozilla.org

• by email: necko@mozilla.com

• or by submitting a Core::Networking bug on bugzilla.mozilla.org

How-to’s

• HTTP Logging
• Submitting Actionable Networking Bugs
• Captive Portal Detection
• Connectivity Checking

Tutorials

• Networking Test Guidelines
• HTTP Server for Unit Tests
• Introduction to Mochitest framework with HTTP/2 and HTTP/3 Support

Deep Dives

Necko Design

• Security and Networking Components
• HTTP Cache
• Http3Session and Streams
• Necko Bird’s-eye View
• Gecko HTTP Walkthrough
• Firefox Network Scheduling and Prioritization

Necko Features

• The Lifecycle of a HTTP Request
• DNS over HTTPS (Trusted Recursive Resolver)
• URL Parsers
• WebTransport (WIP)
• Captive Portal Detection
• Early Hints

References

• New-to-Necko Resources - An Aggregation
• Neqo Triage Guideline
• Necko Lingo