Is your multi-browser setup truly anonymous? Demystifying Canvas fingerprinting

Have you noticed that even after changing your IP, clearing cookies, and even running multiple browser instances, your accounts are still easily identified? The real culprit behind this is very likely Canvas fingerprint detection.

Even if you open more than a dozen browser windows, if the browser fingerprint environments are not differentiated, websites can still easily recognize you.

Next, we’ll explain how Canvas fingerprinting works when using multiple browsers, how it operates behind the scenes, and why simply changing your IP doesn’t help.

I. What Is Canvas Fingerprint Detection?

Simply put, Canvas fingerprint detection uses the browser’s HTML5 Canvas API to generate a unique image. By analyzing differences in the rendering results, it can identify a user’s device, browser, and operating system environment.

Why do these differences occur? They mainly depend on the following factors:

•  Operating system and graphics drivers: Different systems and GPUs may produce slightly different pixels when rendering the same Canvas image.

•  Browser version and rendering engine: Chrome, Firefox, and Edge use slightly different algorithms when rendering the same Canvas.

•  Fonts and plugins: Installed system fonts, browser extensions, or security software can all affect Canvas rendering results.

In other words, even if you clear cookies and cache, Canvas fingerprints can still allow websites to “recognize” you.

II. Why Are Multiple Browsers Easily Identified?

Many users try running multiple browsers to manage several accounts, but soon find that even with different IPs, websites can still identify them. The underlying reason is the browser fingerprint environment.

Each time a new browser instance is opened, if the environment configuration is exactly the same—such as operating system, browser version, screen resolution, and Canvas rendering behavior—browser fingerprint detection will conclude that it is the same user.

In other words, running multiple browsers is not a universal “anonymous solution.” Without differentiating Canvas fingerprints, WebGL data, font lists, and other parameters, accounts can easily be banned or restricted.

III. How to Check Your Browser Fingerprint Environment?

You can use the ToDetect fingerprint detection tool to analyze your current browser’s fingerprint information across Canvas, WebGL, fonts, plugins, and more, and see whether your environment is easy to identify.

The process is very simple:

1. Open the ToDetect fingerprint detection website.

2. Click “Detect Fingerprint” and wait for the system to generate a report.

3. Review the Canvas fingerprint values, WebGL fingerprint values, and other details, focusing on features that are easy to identify.

With this tool, you can clearly see which areas need optimization, such as whether your Canvas rendering is overly unique or whether your browser version stands out.

IV. How to Optimize Multi-Browser Environments and Reduce Identification Risk?

1. Never “Copy and Paste” Browser Environments

One of the most common mistakes beginners make when using multiple browsers is cloning a single browser configuration and launching ten or twenty identical environments.

From a fingerprint detection perspective, this is almost equivalent to exposing yourself directly. The reasons are simple:

•  Identical Canvas fingerprints

•  Identical WebGL parameters

•  Identical font lists, time zones, and screen resolutions

To detection systems, this isn’t multiple people—it’s the same person using different windows. Optimization tips:

•  Generate each browser environment independently

•  Even on the same device, ensure fingerprint parameters differ

•  Aim for “reasonably different,” not “fully random”

2. Handle Canvas Fingerprints Carefully—But Don’t Over-Randomize

Some tools try to evade detection by changing Canvas rendering every time, which can actually trigger risk controls.

For normal users, Canvas fingerprints are stable. Frequent changes look abnormal. The correct approach is:

•  Each browser environment should have a fixed Canvas fingerprint

•  Different environments should have different Canvas fingerprints

•  Repeated visits within the same environment remain consistent

In short: “Different between environments, stable within each environment.”

3. WebGL and GPU Information Must Match Canvas

Canvas fingerprints never exist in isolation; they are usually evaluated together with WebGL fingerprints and GPU parameters.

If you encounter the following situation, identification becomes very likely:

•  Canvas appears to indicate Windows

•  But WebGL exposes macOS GPU information

This is an obvious abnormal fingerprint environment. Optimization strategies:

•  WebGL GPU models should match the operating system

•  Browser engine, OS version, and GPU info must be logically consistent

•  Avoid unrealistic parameter combinations

4. IP ≠ Environment: IP Must Match the Browser Fingerprint

Many people focus only on IP addresses and overlook their relationship with browser fingerprints. For example:

•  US IP + Chinese OS + China time zone

•  European IP + Asian font environment

Such combinations can easily trigger risk controls. Optimization tips:

•  Match IP location with language and time zone

•  Avoid random browser language settings

•  Align system environment with typical usage patterns of the IP region

5. Don’t Change Environments Frequently—Stability Matters More

One final often-overlooked point: once a browser fingerprint environment is in use, keep it as stable as possible.

Frequently modifying fingerprint parameters appears highly suspicious to detection systems. The correct logic is:

•  One account = one fixed browser fingerprint environment

•  Stable environment + normal behavior

•  Looks like a real user

In Summary

Running multiple browsers is not a numbers game—it’s about environment management. If your Canvas fingerprints, WebGL data, font lists, and system parameters are all the same, even dozens of windows can still be identified.

Remember: stable environments, reasonable differences, and proper verification are the keys to safe multi-browser usage. With the ToDetect fingerprint detection tool, each browser environment can remain both stable and independent, greatly reducing the risk of identification.