Since Firefox 18 i think when direct link to video or audio file in supported format is clicked the browser generates html5 page with video/audio tag and tries to play it instead of opening it as configured. Unfortunately the build in player lacks both in features and formats support when compared to some plugins and is not suitable as drop-in replacement for them. Is there a way to disable the new behavior and open links normally?

I know that disabling formats in about:config (media.format.enabled) solves the problem, but it also breaks pages, that intentionally use audio/video tags.