Platform/Layout

About

The Platform Layout Team is primarily responsible for Gecko's style system and layout engine. We strive to build and maintain an engine that is both high-performance and standards-compliant, while providing support for features unique to Firefox.

The team's technical domains within Gecko include:

• CSS animations and transitions
• CSS parsing and computation
• Layout (of all types, including block and inline, positioned, columns, floats, flexbox, grid, form controls, images, video, tables, and text)
• Printing
• SVG

Contact Information

• Matrix/Riot.IM: #layout on chat.mozilla.org
• Slack: #layout on Slack (MoCo employees only)
• E-mail: dev-tech-layout@lists.mozilla.org

Communications Channel Guidelines

• Synchronous discussions about engineering-specific topics (bugs, patches, code reviews, architectural issues, etc.) should happen in Matrix/Riot.IM.
• Synchronous discussions about team operations, announcements, strategy, roadmap, and other banter tend to happen in Slack, unless such communications can and should be made public.

Roadmap and Status

This project tracker on Trello contains all work-in-progress and backlog items that the team is considering for the near future. Note that this list is subject to change at any time.

For more detailed information, notes from the team's weekly standup meetings are available.

Release Notes

We publish notes and lists of all fixed layout bugs for a given release. These release notes call out items of particular importance (new features, webcompat fixes) that may be helpful for web content authors.

Filing a Bug

Open a bug under "Product: Core", using one of the following components:

• CSS Parsing and Computation
• CSS Transitions and Animations
• DOM: CSS Object Model
• Layout
• Layout: Block and Inline
• Layout: Columns
• Layout: Flexbox
• Layout: Floats
• Controls Layout: Form Controls
• Layout: Generated Content, Lists, and Counters
• Layout: Grid
• Layout: Images, Video, and HTML Frames
• Layout: Positioned
• Layout: Ruby
• Layout: Scrolling and Overflow
• Layout: Tables
• Layout: Text and Fonts
• Print Preview
• Printing: Output
• Printing: Setup
• SVG

Bug Triage Process Guidelines

Please visit our triage page for more information about our triage process and guidelines, as well as useful triage-related bug queries.

Contributing

To get started, read the programmer's primer on Gecko.

Starter Bugs

If you're looking for a good first bug to fix, the following resources may help:

• Simple layout bugs on Bugs Ahoy!
• Layout bugs marked as "good-first-bug" on Bugzilla