Stops all scrolling events on a page from being handled by javascript. Paste in your console for Google Slides when using a Magic Mouse (for example)

stop_scroll.js

function blockScroll( e ){
    e.preventDefault();
    e.stopPropagation();
    e.cancelBubble = true;
}

document.addEventListener('wheel', blockScroll, true );
document.addEventListener('mousewheel', blockScroll, true );
document.addEventListener('DOMMouseScroll', blockScroll, true );

There is an extension in Chrome 'Custom JavaScript' which will execute a script every time you visit a particular domain or page. That could be useful for this script. https://chrome.google.com/webstore/detail/custom-javascript-for-web/poakhlngfciodnhlhhgnaaelnpjljija?hl=en