just tried it, it does not do it with the button object >on clicked condition, maybe by having an invisible button over your object you can trick it, will do some tests if I have time...
edit: nevermind, invisible buttons don't work, will see if I can set the opacity to 0
Edit2: having a Visible button with the css style set like this:
will make it invisible while functionnal it seems with this condition
all you have to do is to have the button over the actual thing you want the user to click and firefox seems to not mind, only tested in preview though
Edit3: https://1drv.ms/u/s!AjkoCSebIn9Jix06aurQIbxLVv-J just did a capx to show it, it places the button over the sprite and sets its opacity to 0 when created, then it basically uses the >on clicked of the button object and firefox seems to not mind at all, result testable here: http://testing-stuff-out-open-url-firef ... alloon.com