Firefox Developer Edition
Release Notes

Improved warning pages for certificate errors and untrusted connections

Firefox has removed support for the RC4 cipher

Right click on a logged object in the console to store it as a global variable on the page

Visual tools for Animation:

• View/Edit CSS animation keyframe rules directly in the inspector
• Visually modify the cubic-bezier curve that drives the way animations progress through time
• Discover and scrub through all CSS animations and transitions playing on the page
• Learn more: http://devtoolschallenger.com/

Visual tools for Layout and Styles:

• Display rulers along the viewport to verify size and position and use the measurement tool to easily detect spacing and alignment problems
• Use CSS filters to preview and create real-time effects like drop-shadows, sepia, etc
• Learn more: http://devtoolschallenger.com/

New memory tool for inspecting the memory heap

Service Workers API

Built-in JSON reader to intuitively view, search, copy and save data without extensions

Add-on signing enforcement