I've been experimenting with a program called 'Belle' which creates browser based visual novels.
I created a short (three minute) test 'game' which includes one animated sex scene.
I've tested it on a Windows 7 computer using Firefox 30, Google Chrome 35, and Internet Explorer 11.
It seems to fully work in Firefox and Chrome, but the ogg sound files don't play in Internet Explorer.
EDIT: Reported results so far:
Windows 7 Firefox everything worked
Windows 7 Google cChrome everything worked
Windows 7 Internet Explorer 11 plays, but no sound
Update: Windows 7 Opera everything works
Mac Safari plays, but no sound
Mac Firefox everything worked
Mac Chrome (canary) everything worked
Ubuntu 12.04 with Firefox everything worked
Ubuntu with Chromium everything worked
Acer Aspire One running Chromium (open source version of the Google CHrome OS) everything worked
Blackberry Playbook, the scene progression worked okay and the animation played but the browser displayed a message saying the sound format was not supported.
Very respectfully,
fleet