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LibreWolf 136.0-2 is an official LibreWolf bsys6 release published on March 6, 2025. It is a historical build from the Firefox 136 generation—not Firefox 136.0.2—and its release page lists Windows, macOS, and Linux packages, plus checksum and signature files. As of September 2026, it is too old to recommend for everyday browsing; choose a current LibreWolf release instead.
See the official 136.0-2 release and its files if you need this exact build for testing or a legacy environment.
What LibreWolf 136.0-2 means
LibreWolf is a privacy- and security-focused browser derived from Firefox. The 136.0 portion identifies the Firefox-generation version the build appears to track; the trailing -2 is a LibreWolf build or packaging revision. It does not mean Firefox 136.0.2.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →The release is labeled LibreWolf bsys6 Release v136.0-2. “bsys6” identifies the project’s build-system/release track, not a separate browser edition or a feature that users need to enable. The project’s release record is dated March 6, 2025.
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Mozilla released Firefox 136 on March 4, 2025, which supports describing this as a Firefox 136-generation LibreWolf build. The release page does not provide a detailed LibreWolf-specific changelog, so it is not possible to attribute particular privacy-setting changes or bug fixes to this build from that record alone.
What changed: LibreWolf notes versus Firefox 136
The official LibreWolf release record identifies the build and lists its downloadable assets, but does not enumerate a separate change list. Avoid treating every Firefox 136 feature as a confirmed LibreWolf change: LibreWolf’s defaults and privacy configuration can affect how upstream features behave.
For context, Mozilla’s Firefox 136 release notes describe upstream changes including an optional updated sidebar and vertical tabs, more granular clearing of saved form information, SmartBlock Embeds for selected social-media content, and HTTPS-First enabled by default. The release also included platform and web-platform updates, such as hardware video decoding for AMD GPUs on Linux, hardware-accelerated HEVC playback on macOS, and features including Intl.DurationFormat and the CSS :open pseudo-class. Those are Firefox 136 notes, not a LibreWolf-specific changelog.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallFirefox 136 also had security fixes documented in Mozilla Foundation Security Advisory 2025-14. That advisory concerns Mozilla’s Firefox release; the LibreWolf release page does not independently document a separately audited security patch set. Mozilla published additional Firefox security fixes after the 136 baseline, including a later fix recorded in its security advisory listings. This is one reason not to treat 136.0-2 as a current browser.
Downloads and package choices
The official release page lists several platform and architecture variants. Choose based on both your operating system and processor architecture; the existence of an old package does not guarantee it will install cleanly on a modern OS.
| Environment | Package to look for |
|---|---|
| Windows 64-bit | x86-64 installer, portable package, or MSIX |
| Windows 32-bit | x86/i686 installer, portable package, or MSIX |
| macOS on Intel | x86-64 DMG |
| macOS on Apple Silicon | ARM64 DMG |
| Debian, Ubuntu, or compatible Linux | Architecture-matched DEB (x86-64 or ARM64) |
| Fedora or a compatible RPM-based Linux system | Architecture-matched RPM (x86-64 or i686) |
| Other Linux setup | Architecture-matched tar archive; Linux ARM64 and i686 options are listed |
The release includes Windows x86 and x86-64 packages; Intel and Apple Silicon macOS DMGs; and Linux DEB, RPM, and tar packages for listed architectures. It also provides source archives and integrity files. Check your system’s CPU architecture before downloading: do not choose ARM64 for an x86-64 computer, or i686 when a suitable x86-64 package is available. A generic DEB or RPM may have dependency or library requirements that vary by distribution. A tar archive is not the same as a system package, and packages from community repositories or other channels may have different update behavior and provenance.
Verify the downloaded file
The release record provides SHA-256 checksum files and signatures, including a checksum list. A hash comparison can reveal whether the downloaded file matches the published checksum. A signature can offer stronger provenance assurance when it is checked against a signing key obtained from a trusted project source. The release record alone does not establish a key-distribution procedure or fingerprint, so do not trust a key copied from an unverified forum post.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsRun the command appropriate for your system, replacing the example filename with the exact asset you downloaded:
# Linux
sha256sum librewolf-136.0-2-linux-x86_64-package.tar.xz
# macOS
shasum -a 256 librewolf-136.0-2-macos-x86_64-package.dmg
# Windows PowerShell
Get-FileHash .librewolf-136.0-2-windows-x86_64-setup.exe -Algorithm SHA256Compare the resulting hash with the matching entry in the official release’s checksum file. Make sure the checksum corresponds to the exact filename and that you obtained both files from the official release record. A matching hash checks integrity relative to that published checksum; it is not a substitute for validating a signature and its trusted key.
If the hash does not match, do not run the file. Delete it, download it again from the official release page, and recheck. A partial download, proxy, security software, or other transfer problem can cause a mismatch, but the cause should be resolved before installation. If a signature check fails, verify that the signature belongs to the exact asset and that its key is trusted through a project-controlled source. Do not proceed while the failure is unresolved.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Should you install LibreWolf 136.0-2 now?
For ordinary browsing in September 2026, no. It is a March 2025 release, and later LibreWolf builds—including later version series—are listed by the project. A browser needs continuing engine, security, certificate, and compatibility updates. An old build can miss those updates and may also behave poorly on current websites or operating systems. That does not prove the build is inherently compromised; it means it is outside the current update stream and is a poor choice for security-sensitive daily use.
If you already use 136.0-2, move to a current supported LibreWolf build using the project’s current distribution instructions. The project’s release listings show later releases, but the correct installation route and update behavior depend on your operating system and how you installed the browser. An installer, portable package, macOS DMG, DEB/RPM package, tar archive, AppImage, and third-party distribution package should not be assumed to update in the same way.
Best Value
When an older build may still make sense
There are legitimate reasons to retrieve 136.0-2: reproducing a historical browser environment, testing an extension or site against Firefox 136-era behavior, or meeting a specific legacy deployment requirement. In those cases, use it in a controlled test environment rather than as your everyday browser. Limit exposure to untrusted sites and avoid using it for sensitive accounts or transactions.
If you are considering a downgrade after a regression, first try to identify whether the problem comes from an extension, a customized user.js, or a profile setting. Back up the profile before changing versions. A newer browser may alter profile data in ways an older build cannot safely read. The safest comparison is a separate test profile, not opening your current production profile with an old release. If the old build fails to launch or behaves unexpectedly, test with a fresh profile before restoring or copying profile data; avoid copying a whole profile indiscriminately across widely separated browser versions.
Quick Recap
Common installation problems
- Wrong architecture: Confirm whether the device is x86-64, ARM64, or 32-bit i686 and download the matching asset. An architecture mismatch can prevent installation or launch.
- Linux dependency errors: A DEB or RPM may not match your distribution’s dependencies or library baseline. Check the distribution’s compatibility and use the package format intended for it rather than forcing installation.
- Portable package confusion: A portable archive is not necessarily integrated into the system like an installer or package-manager installation. Follow the instructions associated with that specific asset.
- Browser will not start or settings look wrong: Test with a fresh profile and temporarily disable extensions. If you use a customized
user.js, check whether it is overriding preferences before assuming the release itself is at fault. - Checksum or signature mismatch: Stop and resolve the verification issue; do not execute the file.
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