Strict Sites

Some sites use strict CSP or dynamic page bootstrapping.

What to change first

1. Keep @match exact.
2. Start with @run-at document-end.
3. Move to document-idle if elements load late.
4. Remove unnecessary @require dependencies.

Diagnostic pattern

const el = document.querySelector('#target');
console.log('target found:', Boolean(el), location.href);

If behavior is inconsistent

• Turn on Enhanced debugging.
• Check editor script error logs.
• Disable other scripts that touch the same page.