Performance Fingerprinting

Performance timing and execution speed create a hardware-level fingerprint. BotBrowser provides comprehensive protection against timing-based tracking.

Prerequisites

Familiarity with Browser Fingerprinting Explained.
BotBrowser installed with a valid profile. See Installation.

Quick Start


chromium-browser \
  --bot-profile="/path/to/profile.enc"

Start with this launch to establish a clean baseline before adding extra overrides.

Overview

Performance and timing data can serve as a hardware-level fingerprint. BotBrowser provides comprehensive protection across all timing-related surfaces.

Configuration

Performance Timing Protection

Use --bot-time-seed for deterministic execution timing diversity (ENT Tier2):


# Each seed produces a unique, stable performance profile
--bot-time-seed=42

This applies deterministic timing diversity across browser operations and navigation timing entries.

Timing Scale

Use --bot-time-scale to compress high-resolution timing intervals (ENT Tier2):


# Scale down timing intervals (range 0.80-0.99)
--bot-time-scale=0.92

This emulates lower system load and reduces timing skew signals.

Frame Rate Control

Control frame rate behavior with --bot-fps (ENT Tier2):


# Use profile-defined frame rate
--bot-fps=profile
 
# Use native frame rate
--bot-fps=real
 
# Set specific frame rate
--bot-fps=60

Network Information Override

Control network connection property values with --bot-network-info-override:


# Use profile-defined network info values
--bot-network-info-override

This overrides network connection properties and corresponding Client Hints headers with profile-defined values.

Stack Depth Control

Control JavaScript recursive call stack depth with --bot-stack-seed (ENT Tier2):


# Match profile's exact depth
--bot-stack-seed=profile
 
# Use native depth
--bot-stack-seed=real
 
# Per-session depth variation
--bot-stack-seed=42

How BotBrowser Provides Protection

BotBrowser provides protection across all performance and timing surfaces: operation timing, navigation timing, frame rate, network connection properties, stack depth, and CPU core scaling. The flags listed above can be combined for comprehensive coverage. --bot-time-seed and --bot-time-scale protect against different aspects of timing and can be used together.

Common Scenarios

Capture a baseline result using the Quick Start setup.
Change one relevant setting at a time and compare the new output.
Keep your final launch command documented so future checks are reproducible.

Troubleshooting / FAQ

Problem	Solution
Timing profile identical across instances	Use different `--bot-time-seed` values for each instance.
Frame rate doesn’t match profile	Set `--bot-fps=profile` or specify a target rate like `--bot-fps=60`.
Network connection info shows real values	Enable `--bot-network-info-override` to use profile-defined values.
Performance entries show real server timing	`--bot-time-seed` redistributes entry timing. Verify it is set.

Next Steps

Navigator Properties. Connection info and other navigator APIs.
Canvas Fingerprinting. Rendering-based tracking protection.
Audio Fingerprinting. Audio processing fingerprint protection.
CLI Flags Reference. All timing and performance flags.

Legal Disclaimer & Terms of Use • Responsible Use Guidelines . BotBrowser is for authorized fingerprint protection and privacy research only.