Firefox Developer Edition
Release Notes

Share Hello URLs with social networks

Improve performance of IPv6 fallback to IPv4

Removed support for insecure SSLv3 for network communications

Disable use of RC4 except for temporarily whitelisted hosts

NPAPI Plug-in performance improved via asynchronous initialization

Drag and drop enabled for nodes in Inspector markup view

Web Console input history persists even after closing the toolbox

Cubic bezier tooltip now shows a gallery of timing-function presets for use with CSS animations

localhost is now available offline for WebSocket connections

Added support for CSS Scroll Snap Points

List-style-type now accepts a string value

Vertical text mode enabled by default on Developer Edition

Cascading of CSS transitions and animations now matches the current spec

Implement Cache API

Enable the Fetch API for network requests from dedicated, shared and service workers

Implemented <link rel="preconnect"> allowing anticipation of a future connection without revealing any information

Support for 'switch' role in ARIA 1.1

Vertical text mode enabled by default on Developer Edition