Platform/Roadmap2021

This page is here for historical purposes.

Platform 2022 Roadmap

These are some areas of planned work for Gecko in 2021. For current areas of planned work, see:

• Platform

Architecture

• Cross-platform form controls (some improved stylability)
• WebRender to release
• ...

CSS

New CSS properties

• aspect-ratio

Media query features

• forced-colors

@-rule descriptors

• @page { ‘size’ and ‘page-orientation’ }
• @font-face { ascent-, descent-, and line-gap-override }

CSS Values

• image-set() function

CSS performance improvements

• Better invalidation and performance for attribute selectors (https://bugzilla.mozilla.org/show_bug.cgi?id=1704551)

CSS related privacy

• Reduce fingerprinting by limiting system fonts exposed to the web (https://bugzilla.mozilla.org/show_bug.cgi?id=1582687).

...

Ecma262 and WebVM

Ecma262 and DOM adjacent work

• Transferable Streams (bug 1659025)
• Modules
  • Module loader refactor (bug 1311726), which will allow:
    • Worker Modules (bug 1540913), 
    • worklet import (bug 1572644)
  • Import Maps (bug 1688879)
• Advanced class features
  • Ergonomic brand checks (bug 1648090) (done)
  • Class Static initialization (bug 1670018)
• Maintain our compatibility with the spec (in progress stage 3 proposals)
  • Temporal (bug 1519167) 
  • Import assertions (bug 1668330) 
  • JSON modules (bug 1670176) 
  • Error.cause (bug 1679653)
• We are expecting a few larger proposals to advance in the coming months, namely resizable ArrayBuffers and growable SharedArrayBuffers. This plan is subject to change.

Ecma402

• Intl.Segmenter (bug 1423593)
• Intl.LocaleInfo (bug 1693576)
• Platform Architecture (target: lower maintenance cost, perf, memory)
  • Unified Architecture (bug 1686965)
  • ICU4X (bug 1684927)

WASM

• SIMD support (bug 1625130) (done)
• Exceptions (bug 1335652) (mostly done)
• Expected on nightly but not release:
  • feature detection (no bug yet)
  • Memory64 (bug 1677586) 
  • relaxed SIMD (bug 1706922)
  • extended constant expressions
  • js type reflection (bug 1651725)
  • GC MVP (bug 1488199)
• Our general stance is to boost & implement features that matter to how wasm can be used on the web by current and plausible future tools
  • C/C++/Rust/Fortran/Go/Java support more important than niche languages
  • Good web interop

...

...

Previously

Some of this was tracked in previous years at other pages, which we’re going through and cleaning up:

• CSS#Previously
• DOM#Older_content

See Also

• Standards
• Platform