Mozilla Firefox beta specifications

What's new in version 33.0b4

New: Enhanced Tiles
New: Continued experimentation with WebRTC-powered communications feature
New: OpenH264 support (sandboxed)
New: Slimmer and faster JavaScript strings
New: Improved reliability of the session restoration
New: New CSP (Content Security Policy) backend
New: Improved search experience through the location bar New: Connect to HTTP proxy over HTTPS
New: Search suggestions on the Firefox Start Page (about:home)
New: Azerbaijani [az] locale added
Changed: JSD (JavaScript Debugger Service) removed in favor of the Debugger interface (learn more)
Changed: Proprietary window.crypto properties/functions removed
HTML5: DOMMatrix interface implemented
HTML5: @counter-style rule from CSS3 Counter Styles specification implemented
HTML5: WebCrypto: wrapKey and unwrapKey implemented
HTML5: WebCrypto: Import/export of JWK-formatted keys
HTML5: WebCrypto: RSA-OAEP, PBKDF2 and AES-KW support
Developer: Developer tools: Paint flashing for browser content repaints
Developer: Cubic-bezier curves editor
Developer: Display which elements have listeners attached Developer: New sidebar which displays a list of shortcuts to every @media rule in the current stylesheet
Developer: Editable @keyframes rules in the Rules section of the Inspector
Developer: CSS transform highlighter to the style-inspector


  • Publisher Mozilla
  • Publisher web site
  • Release date September 17, 2014
  • Date added September 17, 2014
  • Version 33.0b4


System requirements

  • Operating systems Mac OS X 10.8, Mac OS X 10.9, Mac OS X 10.7, Mac OS X 10.6
  • Additional requirements Not available

Download information

  • File size 64.16MB
  • File name Firefox 33.0b4.dmg


  • Total Downloads 117,102
  • Downloads last week 61


  • License model Free
  • Limitations Not available
  • Price Not available