I want to write a webextension that displays a tiny dialog to obtain some sensitive data from users. However, I do not what thieves.com to be able to produce a dialog that looks exactly like the one I would be presenting.
Is there any way to do that in any of the common browsers? One thought would be to put the dialog in the URL bar, which I do not think is possible from a web page. But is that really impossible from a web page and is it possible using a normal extension?
Another option might be something like the ctrl-alt-delete that used to protect windows. Have the user type some keystroke that cannot be intercepted by javascript.