You need three PNG icons in the /icons folder:
Here’s what makes Requestly a top-tier choice for data tampering: tamper data chrome
// Attach delete events document.querySelectorAll('.deleteBtn').forEach(btn => btn.addEventListener('click', (e) => const idx = parseInt(btn.getAttribute('data-index'), 10); chrome.runtime.sendMessage( action: 'removeRule', index: idx , () => loadRules(); ); ); ); You need three PNG icons in the /icons
If your primary goal is to tamper with HTTP request or response headers, ModHeader is the quickest tool available. const idx = parseInt(btn.getAttribute('data-index')