Remove "Reels and short videos" from Facebook News Feed with less than 35 lines of JavaScript code. It works both on Desktop and Mobile web version of Facebook.

content_script.js

chrome ??= browser;

function removeReels(node) {
  if (!node) return;
  const bannedInnerTexts = ["Reels and short videos", "Reels"];
  const text = node.querySelector?.(`div > span[dir="auto"]`)?.innerText ?? "";
  const matchedOnDesktop = bannedInnerTexts.find((t) => t === text);
  const matchedOnMobile = bannedInnerTexts.includes(
    node.querySelector("div > span")?.innerText,
  );

  if (matchedOnDesktop) {
    const child = node.querySelector("div");
    child.style.display = "none";
  } else if (matchedOnMobile) {
    node.style.display = "none";
  }
}

function mutationCallback(mutations) {
  for (const mutation of mutations) {
    for (const node of mutation.addedNodes) {
      removeReels(node);
      [100, 250, 500, 750, 1000, 1500].forEach((ms) =>
        setTimeout(() => removeReels(node), ms),
      );
    }
  }
}

{
  const observer = new MutationObserver(mutationCallback);

  window.addEventListener("load", () => {
    observer.observe(document.body, {
      subtree: true,
      childList: true,
      attributes: true,
    });
  });
}

manifest.json

{
  "manifest_version": 3,
  "name": "My Social Media Extension",
  "description": "A helpful extension to enhance your social media experience",
  "version": "1.0.0",

  "content_scripts": [
    {
      "matches": [
        "https://www.facebook.com/*",
        "https://web.facebook.com/*",
        "https://m.facebook.com/*"
      ],
      "js": ["content_script.js"],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://www.facebook.com/*",
        "https://web.facebook.com/*",
        "https://m.facebook.com/*"
      ],
      "js": ["content_script.js"],
      "run_at": "document_idle"
    }
  ],

  "permissions": ["tabs", "activeTab", "storage", "scripting"],

  "icons": {
    "128": "icon128.png"
  }
}