Firefox attempts to navigate to .mp3

[Andreas E.]

When clicking a play button, Firefox sometimes sets the resource path of an mp3 into the address bar and attempts to navigate to it.

This caused a freeze and hard crash in Firefox ~< 20, now it still opens a full-tab totem plugin and plays the mp3. The expected behavior is that the address is always an html page, and the mp3 file is only played by the music player within the page. I didn't find a reproducible pattern, but it happens when clicking for the first time a play button after loading to that page.

[Dave Morley (davmor2)]

Andreas Thanks for this bug report could you please provide some example file links that this has happened on and can you confirm if it happens everytime you click play on it please?

Many thanks.

[Andreas E. (andreas-e)]

It just happend to me again just seconds ago:
1. I signed into Ubuntu One, and navigated to the music store.
2. I clicked "Show all" for the top tracks https://one.ubuntu.com/music-store-up/top-tracks
3. I clicked the play button for the first item in the list and Firefox 21 navigated to
https://3rdpartymedia.ubuntuone.com/7digital/previews/clips/0/28905854.clip.mp3

When I reloaded the top tracks page, it was not reproducible and played as normal.

[Andreas E. (andreas-e)]

This issue has continued being there all the time. I have to reload every page several times until I get music properly playing without Firefox offering to download the mp3 file, and it makes UbuntuOne music barely usable.

I noticed that it happens always when I load a page into a new (background) tab.
And for the current (foreground) tab it happens when I click play on the firsttop-most item within < 3s after loading the page. When I wait >= 3s before playing, it works most times.