I've not had time to test this but I've had another report which was very excited to find out that it does:
This is a blisteringly clever hack. Even works on mobile Firefox! twitter.com/samthor/status…
06:21 AM - 04 Jun 2019
Sam Thorogood 🥑💧
detecting ⌘-A on the web: https://t.co/iv8F4BnsjM
Try Emojityper—type some text/emoji, tab-focus to a button, and then try Select All.
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