Jake WriterandClaude Opus 5.5
676fb3f7c1
anti-font-fingerprinting.patch added a seeded amount to every glyph advance, so that text widths differed per context. No real machine produces those widths: the same font on the same OS measures the same everywhere. So the noise was itself a fingerprint, measured in #779 at +1 px per ~100 glyphs plus fractional deltas on every measureText. #779 defaulted the seed to 0 and kept it as an opt-in, but an opt-in whose only effect is to become detectable is not worth carrying. Removed: - The browser side: - FontSpacingSeedManager and window.setFontSpacingSeed; - the HarfBuzz hook; - the plumbing that existed only to carry the context id down to the shaper: the userContextId on gfxTextRun, gfxShapedWord and the word-cache key, and the extra MakeTextRun argument in nsTextFrame, nsFontMetrics, MathML and canvas. The font group keeps its userContextId, which font-list-spoofing.patch uses to apply the per-context font list. Text is now shaped exactly as stock Firefox shapes it. - The fonts:spacing_seed key. The launcher had been sending 0 on every launch, plus a setFontSpacingSeed(0) call in every context's init script. - tests/patches/config-overrides.py, which tested only the spacing override. A pythonlib test now covers config_overrides with another key. timezone-spoofing, webrtc-ip-spoofing and window-setter-seal change only in context lines and the setter seal list. Every patch applies cleanly to a fresh tree, and the result builds. The settled decision is recorded as no-glyph-spacing-noise, with an automated check. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Camoufox Python Interface
Lightweight wrapper around the Playwright API to help launch Camoufox.
Note
All the latest documentation is available here.
What is this?
This Python library wraps around Playwright's API to help automatically generate & inject unique device characteristics (OS, CPU info, navigator, fonts, headers, screen dimensions, viewport size, WebGL, addons, etc.) into Camoufox.
It uses fpgen under the hood to generate fingerprints that mimic the statistical distribution of device characteristics in real-world traffic.
In addition, it will also calculate your target geolocation, timezone, and locale to avoid proxy protection (see demo).
Installation
First, install the camoufox package:
pip install -U camoufox[geoip]
The geoip parameter is optional, but heavily recommended if you are using proxies. It will download an extra dataset to determine the user's longitude, latitude, timezone, country, & locale.
Next, download the Camoufox browser:
camoufox fetch
To uninstall, run camoufox remove.
Installing multiple Camoufox versions & from other repos
UI Manager
Manage installed browsers, active version, IP geolocation databases, and package info. Basically a Qt front end for the Python CLI tool.
More updates on it will be coming soon.
To use the gui, install Camoufox with the [gui] extra:
pip install 'camoufox[gui]'
To launch:
camoufox gui
CLI Manager
Demonstration
https://github.com/user-attachments/assets/992b1830-6b21-4024-9165-728854df1473
See help message
$ python -m camoufox --help
Usage: python -m camoufox [OPTIONS] COMMAND [ARGS]...
╭─ Options ─────────────────────────────────────────────────────────────────────────────╮
│ --help Show this message and exit. │
╰───────────────────────────────────────────────────────────────────────────────────────╯
╭─ Commands ────────────────────────────────────────────────────────────────────────────╮
│ active Print the current active version │
│ fetch Install the active version, or a specific version │
│ gui Launch the Camoufox Manager GUI (requires PySide6) │
│ list List Camoufox versions │
│ path Print the install directory path │
│ remove Remove downloaded data. By default, this removes everything. │
│ Pass --select to pick a browser version to remove. │
│ server Launch a Playwright server │
│ set Set the active Camoufox version to use & fetch. │
│ By default, this opens an interactive selector for versions and settings. │
│ You can also pass a specifier to activate directly: │
│ Pin version: │
│ camoufox set official/stable/134.0.2-beta.20 │
│ Automatically find latest in a channel source: │
│ camoufox set official/stable │
│ sync Sync available versions from remote repositories │
│ test Open the Playwright inspector │
│ version Display version, package, browser, and storage info │
╰───────────────────────────────────────────────────────────────────────────────────────╯
sync
Pull a list of release assets from GitHub.
> camoufox sync
Syncing repositories...
Official... 24 versions
CoryKing... 2 versions
Synced 26 versions from 2 repos.
set
Choose a version channel or pin a specific version. Can also be called with a specifier to activate directly.
Interactive selector:
> camoufox set
You can also pass a specifier to pin a specific version or choose a channel to follow directly. This will pull the latest stable version from the official repo on camoufox fetch.
> camoufox set official/stable # Default setting
Follow latest prerelease version from the official repo, if applicable:
> camoufox set official/prerelease
Pin a specific version:
> camoufox set official/stable/134.0.2-beta.20
active
Prints the current active version string:
> camoufox active # Default channel is active
official/stable
> camoufox set coryking/stable/142.0.1-fork.26
Pinned: coryking/stable/142.0.1-fork.26
Run 'camoufox fetch' to install.
> camoufox active # A specific version is pinned
coryking/stable/142.0.1-fork.26 (not installed)
fetch
Install the latest version from the active channel. By default, this is official/stable. This will also automatically sync repository assets.
> camoufox fetch # Install the latest in the channel
To download the latest from a different channel, or pin a version:
> camoufox set coryking/stable
> camoufox fetch # Will download the latest release from CoryKing's repo for now on
Or pass in the identifier to download directly without activating it:
> camoufox fetch official/stable/135.0-beta.25 # Install a specific version
list
List installed or all available Camoufox versions as a tree.
> camoufox list # show installed versions
> camoufox list all # show all available versions from synced repos
> camoufox list --path # show full install paths
remove
By default, removes the entire camoufox data directory.
> camoufox remove
> camoufox remove -y # skip confirmation prompt
Remove a specific version:
> camoufox remove official/stable/134.0.2-beta.20
Interactively select a version to remove:
> camoufox remove --select
version
Display the Python package version, active browser version, channel, and update status.
> camoufox version
Python Packages
Camoufox v0.5.6
fpgen v1.3.0
Playwright v1.62.0
Browser
Active official/stable/152.0.4-beta.31
Current browser v152.0.4-beta.31
Installed Yes
Latest in official/stable? Yes
Last Sync 2026-03-07 00:23
GeoIP
Database MaxMind GeoLite2
Updated 2026-03-07 00:24
Storage
Install path /home/name/.cache/camoufox
Browser(s) directory size 1.2 GB
GeoIP database size 40.7 MB
Config file /home/name/.cache/camoufox/config.json
Repo cache /home/name/.cache/camoufox/repo_cache.json
path
Print the install directory path.
> camoufox path
/home/name/.cache/camoufox
test
Open Camoufox with the Playwright inspector for debugging.
> camoufox test
> camoufox test https://example.com
server
Launch a remote Playwright server.
> camoufox server
Usage
All of the latest stable documentation is available at camoufox.com/python.