I use Evernote to keep voice and text notes.

Unfortunately, I've just discovered that I can't take full advantage of the cloud storage capabilities of Evernote, because support for Android's native sound file format, AMR, is deficient in Ubuntu. When I view my voice notes in Firefox in Ubuntu, I get a "missing plugin" error.

The problem is discussed on the Evernote forums, but the solutions offered there are really lacking. They all involve saving and converting files, which seems like an unreasonable amount of fiddling. Surely an AMR file is just a sound file, and surely Ubuntu could (and should) have a way of playing it?

There is some suggestion that Media Player can play AMR format, and I thought there was a Media Player plugin for Firefox. But I can not find any specifics.

How can I get Ubuntu to play AMR file directly in Firefox in Ubuntu?