JSFiddle - React, Tailwind, and code Playground

HTML

<div id='ce' contenteditable><b>Trigger a compositionstart event</b> to segfault Firefox 42 on Ubuntu 15.10</div>
(E.g. press backtick twice in the UK (Extended WinKeys) keyboard layout).

JavaScript

var div = document.getElementById( 'ce' );
function blurThenFocus() {
        div.blur();
        div.focus();
}
div.addEventListener( 'compositionstart', blurThenFocus );
div.focus();