browser-canvas-fingerprinting/src/antiextension.js

A simple canvas fingerprinting implementation in browser with specific information used to generate fingerprint

export const extensionBlocked = { value: false };

// install hook
CanvasRenderingContext2D.prototype.putImageData = new Proxy(CanvasRenderingContext2D.prototype.putImageData, {
    apply(target, self, args) {
        if (extensionBlocked.value) return undefined; // reference: https://developer.mozilla.org/zh-CN/docs/Web/API/CanvasRenderingContext2D/putImageData
        return Reflect.apply(target, self, args);
    }
});
// OffscreenCanvasRenderingContext2D.prototype.putImageData 是继承的，不需要再次hook
Math.random = new Proxy(Math.random, {
    apply(target, self, args) {
        if (extensionBlocked.value) return 0.99;
        return Reflect.apply(target, self, args);
    }
}); // 直接搞你的数据源，我就不信你换用 crypto.getRandomValues :)