I've changed my video choice in Custom Settings from Adobe Flash to Quicktime (because I've removed Flash from my computer). I save the change, and if I go away from my profile information and then come back, Quicktime is still shown as my preference. But if I log out and then log back in, it's back to Flash. This has happened several times. Is it normal behavior?

The last time I was on Ballroomdancers.com I changed my video setting from Flash to Quicktime, clicked "Save Settings," and watched some videos. I don't have Flash on my computer, so obviously I wasn't using it to watch the videos.

Today when I got on Ballroomdancers.com I checked my custom settings. Adobe Flash was chosen--again.

Technical details: I'm using Firefox 39.0 on a Macintosh running OS X 10.10.3. I have not deleted any cookies since the last time I visited Ballroomdancers.com.

Is there anything I can do so that I don't have to change (and save) my custom settings each time I log on?