Firefox Workaround for Claude.ai Freeze Issue Using Tampermonkey Script

Firefox Freeze Issue and Workaround

A user on r/ClaudeAI reported persistent freezing issues when using Claude.ai in Firefox and shared a workaround using the Tampermonkey browser extension.

Technical Solution

The workaround involves creating a Tampermonkey script that modifies the Date.now() function to prevent timing conflicts that cause the interface to freeze. The script specifically targets the Claude.ai domain.

Script Implementation

Create a new Tampermonkey script with the following content:

// ==UserScript==
// @name Claude .ai Date.now fix
// @match https://claude.ai/*
// @run-at document-start
// @grant none
// ==/UserScript==

(function() {
  const script = document.createElement('script');
  script.textContent = `
  (function() {
    const _orig = Date.now.bind(Date);
    let _last = 0;
Date.now = function() {
  const t = _orig();
  if (t <= _last) return ++_last;
  return (_last = t);
};

  })();
  `;
  document.documentElement.appendChild(script);
  script.remove();
})();

The script works by intercepting Date.now() calls and ensuring they always return increasing values, preventing potential timing conflicts that cause the freeze.

Setup Requirements

• Firefox browser
• Tampermonkey extension installed
• Script configured to run on https://claude.ai/*

This type of timing workaround is sometimes necessary when browser APIs behave differently across implementations, particularly with time-sensitive operations in web applications.