Add 'Fix YouTube Fullscreen Text Selection'

YouTube/FixFullscreenTextSelection.user.js

@@ -0,0 +1,17 @@
+// ==UserScript==
+// @name         Fix YouTube Fullscreen Text Selection
+// @description  Prevents accidentally selecting text when double-clicking the video to toggle fullscreen.
+// @version      1
+// @license      MPL-2.0
+// @namespace    https://chylex.com
+// @homepageURL  https://github.com/chylex/Userscripts
+// @supportURL   https://github.com/chylex/Userscripts/issues
+// @include      https://youtube.com/*
+// @include      https://*.youtube.com/*
+// @run-at       document-start
+// @grant        none
+// ==/UserScript==
+
+document.addEventListener("onmozfullscreenchange" in document ? "mozfullscreenchange" : "fullscreenchange", function(){
+    window.getSelection().removeAllRanges();
+});