Description of problem:
Firefox 21 has a new feature called "health report" which makes it possible to compare your own firefox with others ones. But this feature can't be activated in firefox shiped by Fedora. It looks like the checkbox state isn't saved on preference window close. So after opening the prefs again the checkbox is unchecked again.

Version-Release number of selected component (if applicable):
firefox-21.0-3.fc19.x86_64
xulrunner-21.0-6.fc19.x86_64

How reproducible:
allways

Steps to Reproduce:
1. Start firefox
2. open prefs
3. open "advanced" tab and select the second sub-tab
4. activate the health report checkbox
5. close and reopen prefs

Actual results:
Health report checkbox is still unchecked

Expected results:
Health report checkbox should be checked

Additional info: