Inserting IME text.
In an existing contenteditable with “Hello World” in it, putting the cursor at the end of the editor and then tying “ ko<enter>” using a Japanese IME keyboard (Hiragana). Ending up with Hello World こ.

Chrome (Desktop)

Safari (Desktop)

Firefox (Desktop)

Chrome (Android)

Typing a different set of characters, because I’m not sure how to use the keyboard.

Safari (iOS)