Firefox 139.0.1
Fixed
-
Fixed graphics corruption with certain NVIDIA graphics adapters and multiple monitors running at mixed refresh rates after updating to Firefox 139. (Bug 1968876)
-
Reference link to 139.0 release notes.

Fixed graphics corruption with certain NVIDIA graphics adapters and multiple monitors running at mixed refresh rates after updating to Firefox 139. (Bug 1968876)
Reference link to 139.0 release notes.

The code signing certificate for OBS has been updated. This may impact game capture compatibility with some anti-cheat solutions with this OBS update. If you are a game or anti-cheat developer please see https://obsproject.com/kb/capture-hook-certificate-update for more information.
OBS-Studio-31.1.0-beta1-Sources.tar.gz: 9bc852b68accd1ed490cf89b023f2af8daff630f19c636a4704ddbfe8062335c
OBS-Studio-31.1.0-beta1-Ubuntu-24.04-x86_64-dbsym.ddeb: 4af78cce345699147155075d93adfeb2dbc6ae7abcdbaa5170a4c6e3c32f666d
OBS-Studio-31.1.0-beta1-Ubuntu-24.04-x86_64.deb: 740b80118b2fa3452bf2294458ece1ce472a1df7a57f7c162a04264930b3a78d
OBS-Studio-31.1.0-beta1-Windows-Installer.exe: c5c89feee62d0849ce09e646565d380f685ed058430556c37d0efc93bb13e840
OBS-Studio-31.1.0-beta1-Windows-PDBs.zip: ee54f5ef76ef9088c0d7c4079a8309cf8b006b6339ff5c17fdb13225bc7c620e
OBS-Studio-31.1.0-beta1-Windows.zip: eadaa8b12572f36ec0311e752956bce9d3bcb28e1eb46f67354eb0cd2f457abb
OBS-Studio-31.1.0-beta1-Windows-arm64-PDBs.zip: 85443465e271d52ba9413fdcfd7cdcbf4b3b749a997c92baec722322ba69a6ec
OBS-Studio-31.1.0-beta1-Windows-arm64.zip: c422cadc8e9701f9f3dea08a57573d85633ce03771ea5641496614f54b10ca18
OBS-Studio-31.1.0-beta1-macOS-Apple-dSYMs.tar.xz: ddebd0be2dc0f206c28768a4fb9498be14b5ae6d95d624e3b048aba67bfa531d
OBS-Studio-31.1.0-beta1-macOS-Apple.dmg: 51e2a79ee24ed67ed290791adcf65e1fef4113b33a01797a58e28ed4c4780416
OBS-Studio-31.1.0-beta1-macOS-Intel-dSYMs.tar.xz: 5c9fa793268fb25ce4c32ddacba56e907a2b68f798a3201e4c9b9e6cc45056d3
OBS-Studio-31.1.0-beta1-macOS-Intel.dmg: e2b82b342e2abc79350a4699c2101f5d4c4d21adf0a0e8d05615e24084ac42a9
By Leo Wattenberg
Wednesday, May 28, 2025On this day, 25 years ago, the very first public version of Audacity was released, Audacity 0.8.
Audacity 0.8 was very different to what we have today: It couldnβt record, it couldnβt use plugins, and it could only export as WAV, AIFF, SF and AU.
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Since then, a lot has happened. Audacity 1.0 was released two years later, sporting a logo and layout thatβs still recognizable today. PCs have turned notably less boxy and beige, and are much faster as well. Theyβre so fast in fact, that many features which would have been unthinkable 25 years ago are now very much possible - and even expected. We have worked tirelessly to improve Audacityβs audio editing capabilities, adding features like realtime effects, non-destructive edits and time stretching, a master channel and even some AI-powered effects which are actually useful.
If youβre curious to learn more about Audacityβs history, our product owner Martin Keary released a video about it when he took over, and our designer Leo Wattenberg ran Audacityβs source code through a visualizer to show the evolution of files within Audacity.
Weβre planning to release another minor patch (Audacity 3.7.4) in the next couple weeks, which among various bug fixes finally brings aforementioned AI effects to macOS.
In addition to that, weβre still working hard on Audacity 4.0, which wonβt be quite yet a DAW β but will tackle a lot of UX snags, which made Audacity so far more annoying to use than necessary. We will soon post an update on what to expect exactly for Audacity 4.0.
After 25 years of making it rather difficult to send any money our way, we finally have opened up a merch store at merch.audacityteam.org. Every purchase made will help support our full-size development team, and accelerate Audacityβs progress to becoming not just the free option for audio editing - but the best option.
Weβll add more designs over the coming months - follow us on YouTube or join our Discord to get notified when new merch drops!
By popular request, Full-Page Translations are now available within Firefox extension pages that start with the moz-extension:// URL scheme.
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The New Tab custom wallpaper (and colors) option is now available! Your own image can be uploaded as your New Tab wallpaper or any custom color can be selected - from the brightest pink to dark gray. This feature will be rolling out gradually to new users and can also be enabled immediately via Firefox Labs. Additionally, new Wallpaper images and a new Celestial category have also been added.
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Link Previews is currently available as an experimental feature which can be enabled via Firefox Labs in the Firefox settings. After enabling, use the Alt+Shift keyboard shortcut when hovering over a link to see the previews in action!
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Address autofill has now been enabled for users in Australia and India.
PNG images with transparency now keep their transparency when pasted into Firefox.
The upload performance of HTTP/3 has been significantly improved, particularly on resumed connections (QUIC 0-RTT) and high-bandwidth and high-delay connections.
Various security fixes.
Due to recent changes in how Chrome encrypts user data on Windows, the Firefox migration wizard can no longer directly import payment methods or passwords from Chrome. However, users can still export passwords from Chrome to a CSV file and then import them into Firefox using the migration wizard or the password manager.
The Review Checker feature is shutting down and will no longer be available after June 10, 2025.
You can find information about policy updates and enterprise specific bug fixes in the Firefox for Enterprise 139 Release Notes.
Based on user requests from both Mozilla Connect and Stack Overflow, the filter setting in the Network panel is now preserved across DevTools Toolbox sessions.
The Debugger's directory root is now scoped to the specific domain where it was set, which aligns with typical usage and avoids applying it across unrelated domains. This builds on previous improvements such as a redesigned UI and easier removal of the root setting. Setting a directory root updates the Source List to show only the selected directory and its children. Learn more
The appearance of the paused line in the Debugger has been refined for better visibility, especially in high contrast mode.
The Temporal proposal, a better version of Date, is now enabled by default in Firefox.
Timer throttling for Workers is now supported.
Closed <details> elements are now searchable and can be automatically expanded if found via find-in-page.
Firefox now supports the hidden=until-found attribute, allowing content to be found via find-in-page when it's otherwise hidden by default.
window.getSelection().toString() now correctly returns the text serialization when text is selected in a text control, improving cross-browser interoperability on some sites.
Added support for the WebAuthn largeBlob extension.
Added support for requestClose() to HTMLDialogElement.
The built-in editor for contenteditable and designMode now handles collapsible white-space(s) before block boundaries and white-space sequences between visible content more consistently with Chrome. As a result, Gecko no longer inserts a padding <br> element after white-space before a block boundary, aligning behavior with other browsers.
Windows users with certain NVIDIA graphics adapters and multiple monitors running at mixed refresh rates may see graphics corruption after updating to Firefox 139. As a temporary workaround, set the gfx.webrender.dcomp-win.enabled preference to false in about:config and restart Firefox. This issue will be addressed in Firefox 139.0.1.
With the release of Firefox 139, we are pleased to welcome the developers who contributed their first code change to Firefox in this release, 14 of whom were brand new volunteers! Please join us in thanking each of these diligent and enthusiastic individuals, and take a look at their contributions:

This is a simple maintenance release that mostly fixes a few small bugs, and updates the bundled DDS FileType plugin.
There are two releases of Paint.NET:
Changes since 5.1.7:

Below are development builds for testing purposes.
Latest development build: 2.4.2.22 (May 15th 2025)
Latest stable release build: 2.4.2
https://github.com/clsid2/mpc-hc/releases/tag/2.4.2
Fixed a crash that could occur when viewing websites that use WebGL. (Bug 1961191)
Fixed an issue where the browser could repeatedly crash when certain SVG effects (like blur or drop shadow) were applied to very small areas. (Bug 1924241)
On Linux, fixed an issue where video playback would appear washed-out on Wayland when HDR support was unavailable. (Bug 1961610)
Fixed an issue where the "Match Case" shortcut Alt+C in the find-in-page toolbar did not toggle the checkbox as expected. (Bug 1952611)
Reference link to 138.0.1 release notes.

Wana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
3379c99890359dcff55aab7f7b3286f87c988d1da2fd616e6a9e305fb0a1de9e ventoy-1.1.05-linux.tar.gz
6718cc9656fa479a682b2463e8b3c79ca82aee469859c4b06d9a537715867ebc ventoy-1.1.05-livecd.iso
3dc1f0a5209c6fa260af9f08951bc4421127b56d4efa3edd2c979af74b1941e5 ventoy-1.1.05-windows.zip
0x80070001 error when boot and install Windows 11. (#3010 #3029 #3105)Attention:
Ventoy2Disk.exe file is updated in this release. It hasn't been updated for several versions.
According to past experience, as soon as this file is upgraded, some antivirus software will give false positives.
Wana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
c77603e8b5cd51d75eb7dd54ea9bd2961c83c7fca8539541b86127f2e790673f ventoy-1.1.04-linux.tar.gz
f76dbaafc43de8f782d3396dca7a3902d9488cc81294777dc386f7b5a27fa511 ventoy-1.1.04-livecd.iso
b2e71dff6796f9ebb6867b6fccb1f9fdf27ef6e5f6893952d8046bd17b6a51fa ventoy-1.1.04-windows.zip
This release was deprecated, because it introducted a problem in LinuxGUI version (Windows version and Linux CLI version are OK).
Please use latest release.
Unsupported vtoy type unknown error when boot a VDI file created by VBox7. Issue 48Wana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
0b47aeba910dd9a9d5faad26988c45bef5238c4eb19e3bf510545698ac5caece ventoy-1.1.02-linux.tar.gz
65dcdfc57d79988f7d7841cbed7b81a4a03fff65b91fdfd70316ca6dd140027e ventoy-1.1.02-livecd.iso
f992fb0569a2f9ec057c7d97800a13ead7acc57a758953800d8d958d0ae471dc ventoy-1.1.02-windows.zip
VTOY_LINUX_REMOUNT implementation to support all Linux distros. Please refer NotesVTOY_LINUX_REMOUNT option now is deprecated, we don't need it anymore. Please refer NotesWana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
611d3fcdeb7c12e8645afe0eb070fcc8ae0dbc0556277131c8f695e2dd8f2af1 ventoy-1.1.01-linux.tar.gz
dd9cc488aa47557201551defc399a014461b51e85a7f1ccf10e20408b4635a0b ventoy-1.1.01-livecd.iso
c088ba56b2d7e05546825380288faa6ee20600652b4fd1d8f78424deb76d76ad ventoy-1.1.01-windows.zip
PS:
The new version 1.1.00 doesn't have any special meaning, just that I think 1.0.100 is too long.
Wana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
27a2abaffa531c673059190975455db7a61583f221528e06da1ee38d1ea5702f ventoy-1.1.00-linux.tar.gz
fef6f9fd42106d06221a861a3a5a2eb6c543fa53c024fabddc6690192653bfe8 ventoy-1.1.00-livecd.iso
04ae8ee05f9d7be532817e7d6736111f470e416860dc0a42561bb5083457d38e ventoy-1.1.00-windows.zip
Linpus Lite error on some computer.Wana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
467cdd188a7f739bc706adbc1d695f61ffdefc95916adb015947d80829f00a3d ventoy-1.0.99-linux.tar.gz
6b0dfc9408be2826903dec8fdf4c47f04ac50202f50a70f0bbc19eb37a737737 ventoy-1.0.99-livecd.iso
578993fcf8d57252bc34536c01dc853a374e60def68f60b2826c3de0826ea00c ventoy-1.0.99-windows.zip
vtoyboot-1.0.35 release. NotesWana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
263041f6f1bb08db3815ba7a208064229660ee5f60d1ee7cb638739dceceb0bc ventoy-1.0.98-linux.tar.gz
b12e2a70e4c5994d131951e2d0787cd1f08d97b7cd0f1bf0c87509fc81c21105 ventoy-1.0.98-livecd.iso
8a21eced5efea22a82b2f8b2783a7db2449c09ef0a4ecb0fa4d019e3ab06e0d1 ventoy-1.0.98-windows.zip
vtoyboot-1.0.31 release. NotesWana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
ventoy-1.0.97-windows.zip: 44fb53f26872c6304e1cb3d47b65d0613665666100c48deeee4cd87901fb500f
ventoy-1.0.97-linux.tar.gz: 1368a9082c9db25958e5407ef4984322d90d3bb00905337d4bd41678e06c1150
ventoy-1.0.97-livecd.iso: ca6369eca22e24d5e1b4a1e824fcde747345aaa2424221912f0f326e10570676
vtoyboot-1.0.30 release. NotesWana boot and install OS through network (PXE)? Welcome to my new project iVentoy.
About iVentoy https://www.iventoy.com
iVentoy is an enhanced version of the PXE server.
Extremely easy to use
Many advanced features
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI mode supported
110+ common types of OS supported (Windows/WinPE/Linux/VMware)
......
SHA-256
ventoy-1.0.96-windows.zip: c37d333bc630076679172cf1934290c3c7c80340a9719369b96628edbdcb724b
ventoy-1.0.96-linux.tar.gz: 794a717c9434bb76e90174d408a94c3bf562c0a701239f5814a277c46cd275c8
ventoy-1.0.96-livecd.iso: 9e1d266497456b9015d231789958f7c4ea1f54f369a41edf11eb3d61c57e29b3
Fixed an issue which caused a blank page to be shown for Home and New Tab pages for some users. (Bug 1963537)
Added a workaround for a bug in outlook.office.com/outlook.live.com where attachment filenames are incorrectly prefixed with UTF-8 when saved. (Bug 1961710)
Reference link to 138.0 release notes.

Profile management helps protect your privacy and stay focused by separating your online life into distinct profiles β for work, school, vacation planning, or whatever you choose. You can now name your profiles and customize them with avatars and color themes for easy recognition, then quickly switch between them β all while keeping bookmarks, tabs, and browsing history completely separate.
![]()
This feature is part of a progressive roll out.
Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience.
Users in the United States can now trigger weather suggestions in the address bar! Simply type a weather-related term or a city name, and view the result directly in the address bar dropdown.
![]()
This feature is part of a progressive roll out.
Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience.
Tab Groups, a new way to organize and take control of your tabs, is now available to all users worldwide. You can create a group by dragging one tab onto another, pausing, then dropping it. You can also now reposition a tab group on the tab bar by dragging it.
Firefox on Windows 11 now uses acrylic-style menus for popup windows, which better match the operating systemβs aesthetic.
You can now copy links from background tabs using the tabstrip context menu on MacOS and Linux.
Various security fixes.
Improved the address and credit card autofill experience to better handle forms that update dynamically as users input information. Autofill now correctly fills newly revealed fieldsβsuch as those shown after selecting a country.
Rededicated previous color settings to Contrast Control settings. (Learn more)
You can find information about policy updates and enterprise specific bug fixes in the Firefox for Enterprise 138 Release Notes.
Added support for the import map integrity field, allowing you to ensure the integrity of dynamically or statically imported modules.
Implemented support for Error.isError, enabling brand checks to determine whether an object is an instance of Error. (Learn more)
Added support for the error.captureStackTrace extension to improve compatibility with other browsers. (Learn more)
A new column has been added to the Network panel to display the full path of the request URL. This enhancement makes helps developers quickly view and analyze complete request paths.
Firefox now applies a uniform user agent (UA) style to <h1> elements, regardless of whether they are used inside <article>, <aside>, <nav>, or <section>. (Learn more)
This feature is part of a progressive roll out.
Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience.
Added support for Import Attributes, allowing developers to specify additional metadata when importing modules.
Applications can now set their preferred degradation method to be used when the configured frame rate and resolution cannot be maintained. (Learn more)
Firefox now enables the cache directive for the Clear-Site-Data header, allowing websites to clear the network cache. This gives websites more control over stored data, such as clearing the cache during logout to help mitigate privacy risks. (Learn more)
Due to recent changes in Chrome on Windows, some users might find that the Firefox migration wizard no longer successfully imports passwords from Chrome or Chrome-based browsers. As a workaround, you can export your passwords as a CSV file from Chrome and then import them into Firefox using either the migration wizard or the Firefox password manager.
With the release of Firefox 138, we are pleased to welcome the developers who contributed their first code change to Firefox in this release, 18 of whom were brand new volunteers! Please join us in thanking each of these diligent and enthusiastic individuals, and take a look at their contributions:

Updates:
Changes/improvements:
Fixes:
Below are development builds for testing purposes.
Latest development build: 2.4.1.29 (April 18th 2025)
Latest stable release build: 2.4.1
https://github.com/clsid2/mpc-hc/releases/tag/2.4.1
Updates:
Fixes:
Below are development builds for testing purposes.
Latest development build: 2.4.0.19 (March 18th 2025)
Latest stable release build: 2.4.0
https://github.com/clsid2/mpc-hc/releases/tag/2.4.0
Updates:
Changes/additions/improvements:
Fixes:
Below are development builds for testing purposes.
Latest development build: 2.3.9.40 (February 7th 2025)
Latest stable release build: 2.3.9
https://github.com/clsid2/mpc-hc/releases/tag/2.3.9
Updates:
Changes/additions/improvements:
Fixes:
Below are development builds for testing purposes.
Latest development build: 2.3.7.26 (November 26th 2024)
Latest stable release build: 2.3.7
https://github.com/clsid2/mpc-hc/releases/tag/2.3.7