Download Mozilla Firefox 37.0 Beta

As we are used to from Mozilla, the first beta release of the next version has already appeared shortly after the release of a stable version of the Firefox web browser. Version 37, which should be released on March 31, adds support for the Media Source Extensions API, so videos on YouTube are now shown in HTML5 instead of FlashPlayer. This was also already in 36 beta, but ultimately did not make it to the final. Below is an incomplete overview of the improvements that we can expect in version 37.

New

• Heartbeat user rating system – your feedback about Firefox
• Bing search now uses HTTPS for secure searching
• Added support for OneCRL for centralized certificate revocation
• Removed support for DSA in certificates and TLS
• Added support for email name constraints in certificates
• Implemented HTTP/2 AltSvc support for opportunistic (unauthenticated) encryption
• New preferences implementation enabled for the first half of the beta cycle

Changed

• Disabled insecure TLS version fallback for site security
• Extended SSL error reporting for reporting non-certificate errors
• TLS False Start optimization now requires a cipher suite using AEAD construction

HTML5

• Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube.
• WebSocket now available in Web Workers
• IndexedDB now accessible from worker threads
• Added support for CSS display:contents

Developer

• Debug tabs opened in Chrome Desktop, Chrome for Android, and Safari for iOS
• New Inspector animation panel to control element animations
• New Security Panel included in Network Panel
• Debugger panel support for chrome:// and about:// URIs
• Added logging of weak ciphers to the web console

The following downloads are available:
Mozilla Firefox 37.0 beta for Windows (English)
Mozilla Firefox 37.0 beta for Linux (English)
Mozilla Firefox 37.0 beta for OS X (English)
Mozilla Firefox 37.0 beta for Windows (English)
Mozilla Firefox 37.0 Beta for Linux (English)
Mozilla Firefox 37.0 Beta for OS X (English)
Mozilla Firefox 37.0 beta for Windows (Frisian)
Mozilla Firefox 37.0 beta for Linux (Frisian)
Mozilla Firefox 37.0 beta for OS X (Frisian)