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/**
 * 1. Open a youtube video
 * 2. Keep scrolling down unitl all comments are shown
 * 3. Right click
 * 4. Select inspect
 * 5. Open the Console tab
 * 6. Copy and paste the code below and press enter
**/
document.querySelectorAll("ytd-toggle-button-renderer#dislike-button").forEach(function(elem) { elem.click(); });