content.js

// Text replacement pairs
const replacements = [
  { pattern: /microsoft/gi, replacement: 'MicroSlop' },
  { pattern: /elon musk/gi, replacement: 'Felon Mask' }
];

// Function to replace text in a text node
function replaceText(node) {
  let text = node.nodeValue;
  let modified = false;
  
  replacements.forEach(({ pattern, replacement }) => {
    if (pattern.test(text)) {
      text = text.replace(pattern, (match) => {
        // Preserve original capitalization pattern
        if (match === match.toUpperCase()) {
          return replacement.toUpperCase();
        } else if (match[0] === match[0].toUpperCase()) {
          return replacement.charAt(0).toUpperCase() + replacement.slice(1);
        }
        return replacement.toLowerCase();
      });
      modified = true;
    }
  });
  
  if (modified) {
    node.nodeValue = text;
  }
}

// Walk through all text nodes in the document
function walk(node) {
  if (node.nodeType === Node.TEXT_NODE) {
    replaceText(node);
  } else {
    for (let i = 0; i < node.childNodes.length; i++) {
      walk(node.childNodes[i]);
    }
  }
}

// Initial replacement
walk(document.body);

// Watch for DOM changes and replace text in new nodes
const observer = new MutationObserver((mutations) => {
  mutations.forEach((mutation) => {
    mutation.addedNodes.forEach((node) => {
      if (node.nodeType === Node.ELEMENT_NODE || node.nodeType === Node.TEXT_NODE) {
        walk(node);
      }
    });
  });
});

observer.observe(document.body, {
  childList: true,
  subtree: true
});