I want Firefox to default to opening all links in firefox.

Whenever I click a link that is associated with a third party app, Firefox opens that app. It doesn’t happen in safari and it significantly hampers usability. (E.g. the IMDB app streams videos but doesn’t seem to actually show information about the shows, so to easily access it, you need the actual site to open, not the app.) I would like to disable this feature and have everything open in the browser, the way it does in safari. How do I do this?