In org-mode I can define external links for example as
The file document.pdf is then opened with an external pdf viewer. The org-mode documentation claims that this command "open[s] via OS, like double-click".
There is, however, a difference to "double-click", as I find that the system-specific default applications (for documents, websites, videos, etc.) are not respected in my setup; On Ubuntu 12.04 the default application for webpages was set to Firefox and only through org-mode local .html files are still openend with Chromium.
How do I configure org-mode to respect my default application settings?