Firefox Beta and Developer Edition
Release Notes
Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.
Firefox Beta — English (US)
Your system may not meet the requirements for Firefox, but you can try one of these versions:
Firefox Beta — English (US)
Firefox Beta is no longer supported on Windows 8.1 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
Firefox Beta is no longer supported on macOS 10.14 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
- Download Firefox Beta
- Download Firefox Beta
- Download Firefox Beta
- Download Firefox Beta
- Download Firefox Beta
- Download Firefox Beta
- Download for Linux 64-bit
- Download for Linux 32-bit
New
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Improved security of the JavaScript Just In Time (JIT) Compiler
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GTK3 integration (GNU/Linux only)
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Use Content Decryption Module as a fallback to decode unencrypted H.264 and AAC media where available
Changed
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WebRTC fixes to improve performance and stability
Developer
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Display dominator trees in Memory tool
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Launch responsive mode from the Style Editor @media sidebar
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Allocation and garbage collection pause profiling in the performance panel
Web Platform
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Added HKDF support for Web Crypto API
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Added support for document.elementsFromPoint
Get the most recent version
Firefox Beta — English (US)
Your system may not meet the requirements for Firefox, but you can try one of these versions:
Firefox Beta — English (US)
Firefox Beta is no longer supported on Windows 8.1 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
Firefox Beta is no longer supported on macOS 10.14 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
- Download Firefox Beta
- Download Firefox Beta
- Download Firefox Beta
- Download Firefox Beta
- Download Firefox Beta
- Download Firefox Beta
- Download for Linux 64-bit
- Download for Linux 32-bit