Just a suggestion for something to add to the document. Here's a test: https://w3c.github.io/i18n-tests/exploratory/vanilla/?text=%D9%82%D8%B1%D9%86%20%D9%82%D9%80%D8%B1%D9%86%20%D9%82%D9%80%D9%80%D8%B1%D9%86%20%D9%82%D9%80%D9%80%D9%80%D8%B1%D9%86&lang=ar&fontSize=36&width=500&height=500 Firefox :( Chrome, Safari :)
