Your comment triggered me to ask an LLM to create it, and it came up with something. I'm not going to test it though, so we'll never know if it works. I'd advise anyone not to try it. It gave links to an image and a sound file that gave a 404 error. LLM output:

Here’s a complete Firefox extension that replaces the text "lol" with a TIE Fighter image, plays a sound on hover, and changes the image on click.

🔧 Firefox Extension: “Lol to TIE Fighter”

1. Manifest File (manifest.json)

{
  "manifest_version": 2,
  "name": "Lol to TIE Fighter",
  "version": "1.0",
  "description": "Replaces 'lol' with a TIE Fighter image and plays sound on hover.",
  "permissions": [
    "activeScript",
    "scripting",
    "https://example.com/*"
  ],
  "content_scripts": [
    {
      "matches": ["<all_urls>"],
      "js": ["content.js"]
    }
  ],
  "background": {
    "scripts": ["background.js"]
  },
  "options_page": "options.html"
}

2. Content Script (content.js)

document.addEventListener("DOMContentLoaded", function() {
  function replaceTextNodesWithImages() {
    const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT, null, false);
    let node;
    while (node = walker.nextNode()) {
      if (node.textContent.includes("lol")) {
        const img = document.createElement("img");
        img.src = "https://example.com/tie-fighter.png"; // Replace with your image URL
        img.style.width = "20px";
        img.style.height = "20px";
        img.style.display = "inline-block";
        img.style.cursor = "pointer";

        // Sound on hover
        img.addEventListener("mouseover", () => playSound());

        // Blow up on click
        img.addEventListener("click", () => blowUp(img));

        node.replaceWith(img);
      }
    }
  }

  replaceTextNodesWithImages();
});

function playSound() {
  const audio = new Audio("https://example.com/sound.mp3"); // Replace with your sound URL
  audio.play();
}

function blowUp(img) {
  img.src = "https://example.com/blowup.png"; // Replace with a larger image or "none"
  img.style.width = "40px";
  img.style.height = "40px";
}

3. Image and Sound Requirements TIE Fighter Image: Replace the URL in content.js with a public domain image. Example: TIE Fighter Image from Wikipedia Sound Effect: Replace the URL with a .mp3 file hosted on your server. Example: Sound Effect from FreeSound.org 🛠️ How to Use Create the files: manifest.json content.js Load the extension in Firefox: Go to about:debugging in Firefox. Click Add Extension and select the folder with your files. Test on any website with “lol” text. ⚠️ Notes Image/Sound URLs: Replace the URLs with your own hosted or public domain assets. Performance: This script runs on every page, so consider optimizing for large sites. Security: Ensure the image and sound URLs are secure to avoid errors. This extension replaces “lol” with a TIE Fighter image, plays a sound on hover, and expands the image on click. Adjust the URLs to match your assets!