Get Rid of Google Sheets’ Annoying Gemini Sidebar

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Q: “How can I prevent the ‘Gemini’ palette from appearing every time I create a new Google Sheet?”

A: There’s no setting in Google Sheets to suppress it.

But the Tampermonkey browser extension, with a script, can do it:

1] install the Tampermonkey extension in your browser

2] click the Tampermonkey icon and select “Create a new script…”

3] highlight the existing code in the <new userscript> window

4] replace the highlighted text by copying-and-pasting the code block below:

// ==UserScript==
// @name         Kill Google Sheets "Gemini" Sidebar
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Auto-dismisses the Gemini sidebar when it appears in Google Sheets
// @match        https://docs.google.com/spreadsheets/*
// @grant        none
// @author       Ezra Kenigsberg, kudotek.com (with big thanks to Claude)
// @copyright    Copyright 2026 Ezra Kenigsberg
// @license      MIT; https://opensource.org/licenses/MIT
// ==/UserScript==
(function () {
  'use strict';
  function dismissGeminiPane() {
    // Target the close button by jsname attribute (most stable selector)
    const closeBtn = document.querySelector('[jsname="TvD9Pc"][aria-label="Close"]');
    if (closeBtn) {
      closeBtn.click();
      console.log('[Tampermonkey] Gemini sidebar dismissed.');
    }
  }
  // Watch for the sidebar being injected into the DOM
  const observer = new MutationObserver(() => {
    dismissGeminiPane();
  });
  observer.observe(document.body, {
    childList: true,
    subtree: true,
  });
  // Also try on initial load in case it's already present
  dismissGeminiPane();
})();

5] click “File | Save”

that’s it!

. . . this is likely to change, when some future version of the sidebar has a <button> whose nut graf differs from the current version’s jsname="TvD9Pc" aria-label="Close"

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