inject.js

const actualCode = `
delete window.navigator.__proto__.brave;
Object.defineProperty(window.navigator, 'plugins', {
	get: () => {
		const plugins = {
			length: 0,
			__proto__: PluginArray.prototype,
		};
		return plugins;
	}
});
`;

const script = document.createElement('script');
script.textContent = actualCode;
(document.head||document.documentElement).appendChild(script);
script.remove();