Firefox (32-bit)

What's new in this version:

New:
- New tab-based preferences
- Ruby annotation support
- Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
- Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
- Base for the next ESR release.

Changed:
- autocomplete=off is no longer supported for username/password fields
- RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
- Page load times improved by speculative connection warmup

HTML5:
- WebSocket now available in Web Workers
- Implemented srcset attribute and element for responsive images
- Implemented DOM3 Events KeyboardEvent.code
- Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
- BroadcastChannel API implemented
- Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback (Windows Vista or later only)
- Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only)

Developer:
- Optimized-out variables are now visible in Debugger UI
- XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
- WebRTC now has multistream and renegotiation support
- copy command added to console