Browser3 149.0.7827.201 r3

Browser3 149.0.7827.201 r3

A multi-profile antidetect Chromium browser for people and AI agents.

Browser3 implements native Chromium-level fingerprint masking while keeping its primary differentiator: Persistent, internally consistent browser identities.

What is new in r3

• The verified TASK-005 v4 GIF and MP4 demo and the dated public validation report are synchronized with this release.
• First run is available through the one-command Windows wrapper: .\browser3.
• The package now includes the loopback-only browser3_agent.py Session API for supported Playwright, Puppeteer, and custom automation clients.
• FAQ, usage, release notes, public-source boundary, and distributed files now describe the same shipped capabilities.

Current release validation

The 2026-08-20 headful, CDP-free Release gate ran without a proxy across all five profiles. All five returned scores and reload measurements. The five-profile averages were:

• tampering_ml_score: 0.0412
• virtual_machine_ml_score: 0.0654
• optional vpn_ml_score: 0.1250

These are dated observations on the stated host and release, not a guarantee of future detector results or bypass. Proxy and multi-geo operation are not part of this release's tested GO.

Install

1. Download Browser3-149.0.7827.201-windows-x64.zip.
2. Verify it with the signed checksum manifest below.
3. Extract the complete archive on Windows 10/11 x64.
4. Run .\browser3.

Python 3.7 or newer must be available through py.exe -3 or python.exe. Keep the complete runtime\ directory intact. A physical hardware-accelerated GPU is required.

Authenticity

Browser3 PE files are not Authenticode-signed. Do not disable SmartScreen or antivirus protection. Verify the detached OpenPGP signature instead:

gpg --import browser3-release-key.asc
gpg --verify SHA256SUMS.txt.asc SHA256SUMS.txt
Get-FileHash -Algorithm SHA256 Browser3-149.0.7827.201-windows-x64.zip

Release-key fingerprint:

138A E853 7368 8ADF FDD0 05A2 7439 B75B E864 5184

The release contains exactly six uploaded assets. GitHub's automatically generated source archives are not installers and are not covered by SHA256SUMS.txt.

Known limits

• Windows x64 only; Widevine is not included.
• Profiles are generated for the current physical machine and should not be moved to different hardware.
• Enabling CDP can cause detector dashboards to report Developer Tools.
• Network-risk observations depend on proxy/IP reputation and changing detector behavior.
• The public source snapshot is MPL-2.0 orchestration and documentation source; it cannot build the proprietary Browser3 executable.

Browser3 149.0.7827.201

First public Windows x64 release of Browser3.

Download and start

Download the release asset Browser3-149.0.7827.201-windows-x64.zip. GitHub's automatically generated Source code (zip) and Source code (tar.gz) archives are not installers and are not covered by SHA256SUMS.txt.

Extract the complete binary archive, keep the runtime/ directory intact, and run:

python scripts\probe_host.py --force
python generate_profiles.py
python launcher.py --profile 1

Python 3.7 or newer must be available as python in PATH.

Verify before running

Verify SHA256SUMS.txt.asc with browser3-release-key.asc, then compare the archive hash with SHA256SUMS.txt.

Release-key fingerprint: 138A E853 7368 8ADF FDD0 05A2 7439 B75B E864 5184.

Browser3 PE files are not Authenticode-signed. Do not disable SmartScreen or antivirus protections merely to run the package.

Important limitations

• Windows 10 version 1809 or newer, x64, and a physical hardware-accelerated GPU are required.
• Widevine is not included, so DRM-protected streaming services may not work.
• The mandatory release gate for this build was completed without a proxy. Proxy and multi-geo operation are not part of this release's tested GO.
• Fingerprint and network-risk scores depend on the host, proxy/IP reputation, and detector changes; no score is guaranteed.
• The public source snapshot contains the MPL-2.0 Python/public layer and cannot build the proprietary Browser3 executable.

Read README.md, RELEASE_NOTES.md, BINARY_EULA.txt, THIRD_PARTY_NOTICES.md, and EXPORT_AND_SANCTIONS.md before use.