# Autoprefixer changelog

> PostCSS plugin that adds vendor prefixes using Can I Use data.

- Vendor: PostCSS
- Category: Developer Tools
- Official site: https://github.com/postcss/autoprefixer
- Tracked by: What's New (https://whatsnew.fyi/product/autoprefixer)
- Harvested from: GitHub (postcss/autoprefixer)
- Entries below: 10 (newest first)

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

## Releases

### 10.5.4

- Date: 2026-07-16
- Version: 10.5.4
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.5.4
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.5.4

- Fixed prefixed rule duplication (by @xianjianlf2).

### 10.5.3

- Date: 2026-07-14
- Version: 10.5.3
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.5.3
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.5.3

- Fixed brackets and gradient parser (@alanturing881).

### 10.5.2

- Date: 2026-06-24
- Version: 10.5.2
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.5.2
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.5.2

- **changed** — Moved -webkit-fill-available before -moz-available so Firefox will use the -webkit- version which is closer to stretch

- Moved `-webkit-fill-available` before `-moz-available`, so Firefox
will use `-webkit-` version which is closer to `stretch`.

### 10.5.1

- Date: 2026-06-23
- Version: 10.5.1
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.5.1
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.5.1

- Fixed `grid-area` span reset for overriding areas (by @puneetdixit200).

### 10.5.0 — 10.5.0 “Each Endeavouring, All Achieving”

- Date: 2026-04-13
- Version: 10.5.0
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.5.0
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.5.0

- **added** — Add mask-position-x and mask-position-y support

<img src="https://github.com/user-attachments/assets/401cb4b1-0f05-459f-9106-47c4f1bbb53d" alt="Coat of arms of Antigua and Barbuda" width="172" height="200" align="right">

- Added `mask-position-x` and `mask-position-y` support (by @toporek).

### 10.4.27

- Date: 2026-02-25
- Version: 10.4.27
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.4.27
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.4.27

* Removed development key from `package.json`.

### 10.4.26

- Date: 2026-02-25
- Version: 10.4.26
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.4.26
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.4.26

* Reduced package size.

### 10.4.25

- Date: 2026-02-25
- Version: 10.4.25
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.4.25
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.4.25

* Fixed broken gradients on CSS Custom Properties (by @serger777).

### 10.4.24

- Date: 2026-01-30
- Version: 10.4.24
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.4.24
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.4.24

* Made Autoprefixer a little faster (by @Cherry).

### 10.4.23

- Date: 2025-12-14
- Version: 10.4.23
- Original notes: https://github.com/postcss/autoprefixer/releases/tag/10.4.23
- Permalink: https://whatsnew.fyi/product/autoprefixer/releases/10.4.23

* Reduced dependencies (by @hyperz111).