Since firefox updated to quantum (57) all things that use a dialogue box simply don’t work/activate, specially with wordpress or admin interfaces of a couple of other websites, like deleting a plugin in a wordpress admin, using visual composer, jQuery dialogue. I ruled out most usual difficulties one by one: used other browsers and everything worked fine, refreshed FF, tried a no-addon attempt and even a clean install, nothing works. Been searching the internet for hours and I gave up and started using chrome for now where this works just fine. (I really don't want to abandon FF after all these years) Any ideas?