I am developing a mobile web app that makes heavy use of contenteditable divs, and firefox android's behavior when typing in them has changed recently in how it handles autocomplete. I have found this behaviour on sites other than my own, and have created a jsfiddle at http://jsfiddle.net/wEyh5/4/ where this can easily be seen. What happens is that when a word in the element is beginning to be deleted, autocomplete will insert the word that is being deleted at the beginning of the word (so start turns into starstart). I have noticed that this does not happen when using the swype keyboard, only the default android keyboard does this. On other browsers, autocomplete in contenteditable elements works fine. Also, autocomplete and backspace perform as expected on input elements and other ways of entering text that I have tested so far. This problem happens on both firefox 17 and 18. Is there some way to make firefox mobile have consistent keyboard behaviour on contenteditable elements?