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)
- Windows 64-bit
- Windows 64-bit MSI
- Windows ARM64/AArch64
- Windows 32-bit
- Windows 32-bit MSI
- macOS
- Linux 64-bit
- Linux 32-bit
Your system may not meet the requirements for Firefox, but you can try one of these versions:
Firefox Beta — English (US)
- Windows 64-bit
- Windows 64-bit MSI
- Windows ARM64/AArch64
- Windows 32-bit
- Windows 32-bit MSI
- macOS
- Linux 64-bit
- Linux 32-bit
Firefox Beta is no longer supported on Windows 8.1 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
Download Firefox ESR 64-bit
Download Firefox ESR 32-bit
Download a different build
Firefox Beta is no longer supported on macOS 10.14 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
Download Firefox ESR
- 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
Firefox Privacy Notice
127.0beta Firefox Beta
May 14, 2024
Version 127.0beta, first offered to Beta channel users on May 14, 2024
Firefox Beta gets updated 3 times a week and as a consequence, the release notes for the Beta channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports.
Warning: Features listed here may or may not make a final release of Firefox.
In addition to these release notes, you can follow ongoing development via our @FirefoxBeta Twitter account.
New
-
You can now set Firefox to automatically launch whenever you start or restart your Windows computer. Setting Firefox to auto-launch optimizes efficiency in our browser-centric digital routines, eliminating manual startup delays and facilitating immediate web access. (Learn more)
-
In Firefox 127, we completed work to optimize and enable DNS prefetching for HTTPS documents via the
rel="dns-prefetch"
link hint. This standard allows web developers to specify domain names for important assets that should be resolved preemptively. -
It is now possible to close all duplicate tabs in a window with the Close duplicate tabs command available from the List all tabs widget in the tab bar or a tab context menu.
-
HTTPS DNS records can now be resolved with the operating system's DNS resolver on specific platforms (Windows 11, Linux, Android 10+). Previously this required DNS over HTTPS to be enabled. This capability allows the use of HTTP/3 without needing to use the
Alt-Svc
header, upgrades requests to HTTPS when the DNS record is present, and enables wider use of ECH.
Changed
-
To reduce user fingerprinting information and the risk of some website compatibility issues, report 32-bit x86 Linux's CPU architecture as x86_64 in Firefox's User-Agent string and
navigator.platform
andnavigator.oscpu
Web APIs. -
Links and other focusable elements are now tab-navigable by default on macOS, instead of following macOS' "Keyboard navigation" setting. This is a more accessible default and matches the default in all other platforms. A checkbox in the settings page still allows users to restore the old behavior.
-
We've updated the screenshots feature in Firefox. You can now take screenshots of various :
about:
pages within Firefox. Plus, you can now screenshot file types like SVG, XML, and more. We've also implemented new keyboard shortcuts and keyboard accessibility, making the screenshot tool more accessible to everyone. Additionally, we've introduced theme compatibility and High Contrast Mode (HCM) support. And not to forget, we've improved performance for capturing large screenshots.
Developer
-
Developer Information
Web Platform
-
navigator.clipboard.read()/write()
has been enabled (see documentation). A paste context menu will appear for the user to confirm when attempting to read clipboard content that is not originated from asame-origin
page. -
Added support for the new Set JavaScript methods for creating unions and intersections of two sets.
Get the most recent version
Firefox Beta — English (US)
- Windows 64-bit
- Windows 64-bit MSI
- Windows ARM64/AArch64
- Windows 32-bit
- Windows 32-bit MSI
- macOS
- Linux 64-bit
- Linux 32-bit
Your system may not meet the requirements for Firefox, but you can try one of these versions:
Firefox Beta — English (US)
- Windows 64-bit
- Windows 64-bit MSI
- Windows ARM64/AArch64
- Windows 32-bit
- Windows 32-bit MSI
- macOS
- Linux 64-bit
- Linux 32-bit
Firefox Beta is no longer supported on Windows 8.1 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
Download Firefox ESR 64-bit
Download Firefox ESR 32-bit
Download a different build
Firefox Beta is no longer supported on macOS 10.14 and below.
Please download Firefox ESR (Extended Support Release) to use Firefox.
Download Firefox ESR
- 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
Firefox Privacy Notice